Variables from the following datasets are currently available for download by the MODE12 software - click on an entry for further information:
Note added 17.10.2017 - many of the data records in the series mentioned above are times at hh:04, hh:09, hh:14... - however, the data are valid at hh:05, hh:10, hh:15, etc, with averages/extremes evaluated over the 5 minute period ending at these times.
At the end of this documents are the following notes:
Note that data are stored, and retrieved using this code, using local time. Thus timestamps are those of BST (summer months) or GMT (winter months). In the summer, BST minus 1 hour is equivalent to GMT. GMT can be considered to be the same as UTC.
Changeover dates are as follows:
year: BST Start (Clock Forward); BST End (Clock Backward)
1997: Sunday, 30 March, 01:00; Sunday, 26 October, 02:00
1998: Sunday, 29 March, 01:00; Sunday, 25 October, 02:00
1999: Sunday, 28 March, 01:00; Sunday, 31 October, 02:00
2000: Sunday, 26 March, 01:00; Sunday, 29 October, 02:00
2001: Sunday, 25 March, 01:00; Sunday, 28 October, 02:00
2002: Sunday, 31 March, 01:00; Sunday, 27 October, 02:00
2003: Sunday, 30 March, 01:00; Sunday, 26 October, 02:00
2004: Sunday, 28 March, 01:00; Sunday, 31 October, 02:00
2005: Sunday, 27 March, 01:00; Sunday, 30 October, 02:00
2006: Sunday, 26 March, 01:00; Sunday, 29 October, 02:00
2007: Sunday, 25 March, 01:00; Sunday, 28 October, 02:00
2008: Sunday, 30 March, 01:00; Sunday, 26 October, 02:00
2009: Sunday, 29 March, 01:00, Sunday, 25 October, 02:00
2010: Sunday, 28 March, 01:00; Sunday, 31 October, 02:00
2011: Sunday, 27 March, 01:00; Sunday, 30 October, 02:00
2012: Sunday, 25 March, 01:00; Sunday, 28 October, 02:00
2013: Sunday, 31 March, 01:00; Sunday, 27 October, 02:00
2014: Sunday, 30 March, 01:00; Sunday, 26 October, 02:00
The consequence of these is that, as clocks go forward at the end of March, on the March dates shown above there will be one hour of data missing in the record (the data for 01:00-01:59 will be marked as missing) - while on the October dates the data for 01:00-01:59 BST will be overwritten with data for 01:00-01:59 GMT (an hour of data will be lost).
Note this system ran from 2005 to early in 2014.
The METFiDAS system, designed and constructed to replace FSDATA, comprised the following elements; METDAS - Data Acquisition System and METDAVS - Data Archive & Visualisation System.
Iain Russell, Giles Harrison, Andrew Lomas, Rosy Wilson and members of the departmental IT team developed the METFiDAS system which recorded, archived and displayed the many surface meteorological quantities here on our Atmospheric Observatory at Reading. The system wasn specially designed to accommodate a wide variety of new and existing instruments, as well as providing a standard logging platform for current and future teaching and research requirements.
On the Observatory itself there are numerous radiation instruments, temperature sensors for air and ground temperature measurements, wind speed and wind direction sensors and atmospheric electricity sensors.
Since the various sensors had different responses to the parameter they measured, signal-conditioning electronics for various instruments were developed. The conditioned output voltages were logged once every second, and averaged at the end of a five-minute period by a Windows PC located in the teaching laboratory on the Observatory. The raw data at 1Hz was also stored there. The data was transmitted over a standard Ethernet link back to the department and onto the department network. The data available using the accompanying extraction program are scaled daily files containing five-minute averages.
Note that missing data appears (or not) in the files in several forms:
In some/many of the FSdata/dervied datafiles all records for a given time appear to be missing every 10 steps (i.e. at 50 minute intervals).
This software was written three years after the demise of METFiDAS. Some of the information about the METFiDAS system and variables has been gleaned from information in files in \RUAOData\METFiDAS\docs\www\. These word documents were the origin of the original webpages that Sheila Bryant put up for the METFiDAS system.
Variable code | Variable | Units | Notes | Availability |
---|---|---|---|---|
Ea | degC | Not available in 1997-2009 | ||
Po | hPa | Not available in 1997-2009 | ||
Rainrate | mm/hr | Not available in 1997-2009 | ||
RHcalc | Calculated relative humidity | % | Derived from the dry bulb [Tdry] and wet bulb [Twet] thermometers
in the Stevenson screen. The following calculation was probably used: RHcalc=100*e/es, where T'=243.5, A=17.67, e0=6.112 e=estw-0.8*(Tdry-Twet) estw=e0*exp((A*Twet)/(Twet+T')) | 2 January 1997-11 January 2009 |
Tdew | Dew point temperature | degC | The dewpoint temperature is derived from the dry bulb
[Tdry] and wet bulb [Twet] thermometers in the Stevenson screen, the following calculation is used Tdew=(T'*ln(e/e0))/(A-ln(e/e0)), where T'=243.5, A=17.67, e0=6.112 e=estw-0.8*(Tdry-Twet) estw=e0*exp((A*Twet)/(Twet+T')), the saturated vapour pressure at the wet bulb temperature | 2 January 1997-11 January 2009 |
U10max | m/s | Assumed to be the maximum wind gust over the previous 5 minutes (i.e. the highest of the 1-sec values) | 2 January 1997-11 January 2009 | |
U10run | m | Not available in 1997-2009 | ||
U2run | m | Not available in 1997-2009 |
Variable code | Variable | Units | Notes | Availability |
---|---|---|---|---|
Dirn10 | 10m wind direction | deg | 2 January 1997 - 11 January 2009 | |
Evap | Not available in 1997-2009 | |||
G | Ground heat flux density | W/m2 | The rate at which heat passes vertically from the surface into the soil, per unit area. | 2 January 1997-11 January 2009 |
Ld | W/m2 | Not available in 1997-2009 | ||
Lu | W/m2 | Not available in 1997-2009 | ||
P | Available from 10 November 1998- 28 June 2002 | |||
PG | Not available in 1997-2009 | |||
Ps | hPa | Not available in 1997-2009 | ||
R1 | V | Some data in 1997-2009, typically 90000 observations at 5 min intervals per year | ||
R10 | V | Some data in 1997-2009, typically 90000 observations at 5 min intervals per year | ||
R11 | V | Some data in 1997-2009, typically 90000 observations at 5 min intervals per year | ||
R12 | V | Some data in 1997-2009, typically 90000 observations at 5 min intervals per year | ||
R13 | V | Some data in 1997-2009, typically 90000 observations at 5 min intervals per year | ||
R14 | V | Some data in 1997-2009, typically 90000 observations at 5 min intervals per year | ||
R15 | V | Some data in 1997-2009, typically 90000 observations at 5 min intervals per year | ||
R16 | V | Some data in 1997-2009, typically 90000 observations at 5 min intervals per year | ||
R2 | V | 2 January 1997 - 11 January 2009 | ||
R3 | V | 2 January 1997 - 11 January 2009 | ||
R4 | V | 2 January 1997 - 11 January 2009 | ||
R5 | V | 2 January 1997 - 11 January 2009 | ||
R6 | V | 2 January 1997 - 11 January 2009 | ||
R7 | V | 2 January 1997 - 11 January 2009 | ||
R8 | V | data from 8 January 1997-11 January 2009; earlier data are suspect | ||
R9 | V | Some data from 4 March 1997 - 15 July 2006 (if values of -5.000 are discounted) | ||
Rain | mm | No data in 1997 - 2009 | ||
Rn | W/m2 | 2 January 1997-11 January 2009 | ||
Sd | Diffuse solar radiation (flux density) | W/m2 | 2 January 1997-11 January 2009 | |
Sg | Global solar radiation (flux density) | W/m2 | 2 January 1997-11 January 2009 | |
Soil moist10, Soil moist30, Soil moist50, Soil moist100 | Soil moisture at depths of 10, 30, 50 and 100 cm | % | Not available in 1997-2009 | |
Su | W/m2 | Not available in 1997-2009 | ||
Tconc | Temperature of the surface of a concrete slab | degC | Not available in 1997-2009 | |
Tdry | Air (dry bulb) temperature | degC | 2 January 1997-11 January 2009 | |
Tgrass | Grass surface temperature | degC | Not available in 1997-2009 | |
Tsoil | Soil surface temperature | degC | Not available in 1997-2009 | |
Tsoil5, Tsoil10, Tsoil20, Tsoil30, Tsoil50, Tsoil100 | Earth temperatures at depths of 5, 10, 20, 30, 50 and 100 cm | degC | Not available in 1997-2009 | |
Twet | Wet bulb air temperature | degC | 2 January 1997-11 January 2009 | |
U10 | Wind speed at 10m height | m/s | Not available in 1997-2009 | |
U2 | Wind speed at 2m height | m/s | data from 3 January 1997-11 January 2009 |
List of changes to operational system
Summary of calibration constants:
Variable code | Variable | Units | Notes | Availability |
---|---|---|---|---|
AH | Absolute humidity | g/m2 | The total mass of water vapour present in the air per unit volume. Derived from
the dry bulb temperature [Tdry] and the vapour pressure [e] according to: AH=1000*(100*e)/(461.5*(Tdry+273)) | 21 December 2006 - 19 May 2014 |
B | W/m2 | 28 February 2007 - 16 September 2009; 5 May 2011 - 19 May 2014 | ||
des dT | ||||
dP/dt | hPa/hr | 29-30 December 2006; 22 January 2007 - 26 July 2014 | ||
dRAIN/dt | mm/hr | 29-30 December 2006; 22 January 2007 - 26 July 2014 | ||
dT/dt | degC/hr | 29-30 December 2006; 21 January 2007 - 26 July 2014 | ||
e | Vapour pressure | hPa | This is derived from the dry bulb (Tdry) and wet bulb
(Twet) screen air temperatures, as follows: e=estw-0.8*(Tdry-Twet), where estw=e0*exp((A*Twet)/(Twet+T')), the saturated vapour pressure at the wet bulb temperature T=243.5, A=17.67, e0=6.112 | 21 December 2009 - 19 May 2014 |
E | mm/h | 28 February 2007 - 16 September 2009; 1 January 2010 - 19 May 2014 | ||
Ea | mbar | 8 August 2005-25 December 2005; 19-20 December 2006 | ||
es | Saturated vapour pressure | hPa | Derived from the dry bulb temperature [Tdry] using es=e0*exp((A*Tdry)/(Tdry+T')), where T'=243.5, A=17.67, e0=6.112 | 21 December 2006 - 26 July 2014 |
H | W/m2 | 28 February 2007 - 16 September 2009; 5 May 2011 - 19 May 2014 | ||
LE | W/m2 | 28 February 2007 - 16 September 2009; 5 May 2011 - 19 May 2014 | ||
Pmsl | MSL pressure | hPa | Determined from the station level
pressure (P) and the dry bulb temperature (Tdry, degC), using these formulae: Pmsl=P*exp(h/H), where H=T*Tbar/g Tbar=(Tdry+273.16)+(lr*h/2) h=62, R=461.4, g=9.81, lr=0.007 | 7-25 December 2005, 19 December 2006 -26 July 2014 (intermittently values are around 800 hPa) |
Ptend | rate of change of pressure; time period of delta-pressure unknown | mbar/hr | 7-25 December 2005, 19 December 2006 - 21 January 2007 | |
r | Specific humidity | g/kg | Derived from the wet bulb [Twet] thermometer (and hence the vapour pressure [e])
according to: r=1000*eta*e/(P-e), where eta=0.622, P=1013 | 21 December 2006-19 May 2014 |
ra | s/m | 27 February 2007 - 26 July 2014 | ||
RAINrate | Rainfall rainfall rate; period of change unknown | mm/hr | 2006: some negative values | 7-25 December 2005, 19 December 2006 - 21 January 2007 |
RH | % | Earlier values (in 2005) are often in the range 102-200 and above | 23 September 2005-6 December 2005 | |
RH sense | % | Earlier values (in 2005) are often in the range 102-400 and above | 8 September 2005-6 December 2005 | |
RHcalc | Calculated relative humidity | % | Derived from the dry bulb [Tdry] and wet bulb [Twet] thermometers
in the Stevenson screen. The following calculation is used: RHcalc=100*e/es, where T'=243.5, A=17.67, e0=6.112 e=estw-0.8*(Tdry-Twet) estw=e0*exp((A*Twet)/(Twet+T')) | 7-25 December 2005, 19 December 2006 - 19 May 2014 (includes some values over 100% and a few missing values) |
RHO | Air density | kg/m3 | 31 January 2007 - 19 May 2014 | |
Sd frac | Values range from -10 to +10 during 2005. | 18 August 2005-6 December 2005 | ||
Sdur | 5-min sunshine duration | h | 7-25 December 2005 | |
Sdur real | 5-min sunshine duration | h | 26 December 2005 - 21 April 2006 | |
Sdur total | Accumulated sunshine total since 0000 UTC | h | The accumulated amount of time during the day which the direct solar radiation
exceeds a level of 120W/m2 Early data in 2005 are not reset to zero at midnight; in addition during 2005 sunshine is recorded overnight at times. | 21 October 2005-31 December 2006 (many values suspect during this period); 1 January 2007-13 October 2013 |
Tdew | Dew point temperature | degC | The dewpoint temperature is derived from the dry bulb
[Tdry] and wet bulb [Twet] thermometers in the Stevenson screen, the following calculation is used Tdew=(T'*ln(e/e0))/(A-ln(e/e0)), where T'=243.5, A=17.67, e0=6.112 e=estw-0.8*(Tdry-Twet) estw=e0*exp((A*Twet)/(Twet+T')), the saturated vapour pressure at the wet bulb temperature. During 2005 values seem unreliable, ranging from -32 to +30 | 8 August 2005-6 December 2005, 19 December 2009 - 19 May 2014 |
TEST | X | Test values | December 2006 | |
Tdry | Air (dry bulb) temperature | degC | 7-25 December 2005 | |
Tdry-1 | Air (dry bulb) temperature as recorded 5 minutes earlier | degC | 7-25 December 2005 | |
Tsky | Effective sky temperature | degC | Derived from the incoming long-wave radiation [Lin],
according to: Tsky=(Lin/sigma)**0.25 - 273.15, where sigma=5.67*10**(-8) | 19 February 2007 - 26 July 2014 |
Ttend | Rate of change of temperature | degC/hr | 7-25 December 2005, 19 December 2006 - 21 January 2007 | |
Twc | Wind chill | degC | The apparent temperature felt on exposed
skin due to the combination of air temperature and wind speed. Wind chill is
only calculated when the dry bulb temperature [Tdry] is < 40 degF (4.44 degC)
and the mean 10m wind speed [U10] > 3 mph (1.34 m/s). The calculation is based upon this formula: Twc=35.74 + (eta*Tdry) - (35.75*(2.237*U10)**0.16) + (0.4275*Tdry*(2.237*U10)**0.16) where eta=0.622 Does Tdry have units of degF and U10 units of m/s? Is TWC then converted to degC? | 29-30 December 2006; various dates during 2007; 2 January 2008 - 31 December 2008; intermittent data in 2009 and also until 19 May 2014 |
Twet dep | (wet bulb depression?) | deg C | During 2005 values seem unreliable, ranging from -9 to +14 | 8 August 2005-25 December 2005, 19 December 2006 - 26 July 2014 |
U10max | Maximum wind speed (m/s) in each 5 minute measurement period, determined from the 1Hz data | m/s | 21 December 2006 - 26 July 2014 | |
U2 real | m/s | 26 December 2005-31 December 2006 | ||
Uchill | X | No data available | ||
Uf | m/s | 27 February 2007 - 26 July 2014 | ||
Umax | m/s | No data available | ||
Urun10 | Accumulated run of wind at 10m since 0000 UTC | km | 7-31 December 2005, 19 December 2009 - 26 July 2014 | |
Urun2 | Accumulated run of wind at 2m since 0000 UTC | km | Values not reset, or reset at unknown intervals | 7 December 2005 - 24 April 2006, 19 December 2006 - 26 July 2014 |
Urun2-total | units given as (X) | Values not reset, or reset at unknown intervals | 26 December 2005 - 24 April 2006 |
Variable code | Variable | Units | Notes | Availability |
---|---|---|---|---|
AECP | V | Some values available during 2006 - generally of value 0. | 13 June 2006-17 December 2006 | |
AspDry | Aspirated wet bulb temperature | degC | 27 April 2011 - 12 November 2012 | |
AspWet | Aspirated wet bulb temperature | degC | 27 April 2011 - 12 November 2012 | |
ch19 | ||||
ch20 | ||||
Ch32 | ||||
Ch34 | ||||
Dirn10 | Wind direction at 10m | deg | Earlier data in 2005 are suspect. | 8 September 2009 - 26 July 2014 |
ESK PG-test | ||||
ESK Sg-test | ||||
Evap | mm | Other dates in 2005 contain missing or negative values | 18 August-8 September 2005; 2 December 2011-28 December 2013 | |
G | Ground heat flux density | W/m2 | The rate at which heat passes vertically from the surface into the soil, per unit area. During 2006 values mostly in the range +40 to -10. Some suspect values in 2009. | 12 August 2006-16 September 2009; 27 July 2010-26 July 2014 |
IAR | V | 13 September 2006-12 January 2007 | ||
IAR-B | V | 16 February 2007- 9 November 2008 | ||
IAR-BT | degC | 20 February 2007-9 November 2008 | ||
IAR-N | V | 22 February 2007-9 November 2008 | ||
IAR-NT | degC | 22 February 2007-14 February 2008; data later in the year are suspect | ||
iCP | pA | 8 June 2009-26 July 2014 | ||
iFP | pA | 8 June 2009-26 July 2014 | ||
Ld | W/m2 | 8 August 2005-10 March 2006 | ||
Lin | Incoming longwave radiative flux density | W/m2 (V used at times in 2006) | Measured using the upward facing pyrgeometer on the CNR1 4-component radiometer. Data during December 2006 - 13 February 2007 are suspect. | 8 May 2006-26 July 2014 |
Lout | Reflected longwave radiative flux density reflected from the surface | W/m2 (V used at times in 2006) | Measured using the downward facing pyrgeometer of the CNR1 4-component radiometer mounted at 1.2m above the surface. Data during January-13 February 2007 are suspect. | 8 May 2006-26 July 2014 |
Lu | W/m2 | 8 August 2005-24 April 2006 | ||
New 115 | degC | 27 July 2006-19 January 2007 | ||
P | Station pressure measured on the Atmospheric Observatory | hPa | Data earlier in 2005 are outside the range 950-1050. Data during 2 June-18 July 2006 are sometimes in error (of order 800 hpa), as are values at times during April-August 2007 and in 2008. | 20 October 2005-26 July 2014 |
Pg | V/m | Data during 2005 seem to be in error, range -0.004 to 4.9 | 15-22 May 2006 | |
PG | Potential gradient at a height of 1m. | V/m | A measure of the magnitude of the vertical atmospheric electric field (V/m) standardised to a reference height of 1m. The PG is measured using a field mill, and at Reading a measurement height of 3m is used. | 23 May 2006--26 July 2014 |
PG2 | V/m2 | 19 December 2006- 19 January 2007 | ||
PG Esk | V | 28 November 2006-19 December 2006; 1-19 January 2007 (data seem suspect) | ||
Ps | hPa | No pressure data during 2005 | ||
Q26 | deg | No valid data during 2005 | ||
R ?? | ??? | 2 August 2006 | ||
R=10 | deg | It is not clear there are valid data during 2005 | ||
R1 | deg | It is not clear there are valid data during 2005 | December 2013 - but data seem meaningless | |
R10 | Research channel 10 | deg | GDACS flat plate in use at times. It is not clear there are valid data during 2005 | Some data during 2007 (units: V); data available in 2008 but values appear to change around 21 July; 1 January 2009-31 December 2009 |
R 106 | ||||
R11 | deg | It is not clear there are valid data during 2005 | Some data during 2007 (units: V); data available in 2008 but values appear to change from August; data 22 June 2010 - 26 July 2014 | |
R12 | deg | It is not clear there are valid data during 2005 | 3 Mar 2006-14 June 2006 | |
R13 | deg | It is not clear there are valid data during 2005 | 3 Mar 2006-14 June 2006 | |
R14 | deg | It is not clear there are valid data during 2005 | 3 Mar 2006-14 June 2006 | |
R15 | deg | It is not clear there are valid data during 2005 | 1 January 2006-15 June 2006; 8 December 2009-26 July 2014 | |
R16 | deg | It is not clear there are valid data during 2005 | Some data during 2007 (units: V); data for 8 December 2009-26 July 2014 | |
R2 | Research channel 2 | deg | It is not clear there are valid data during 2005 | Some data during 2007 (units: V) |
R29 | deg | It is not clear there are valid data during 2005 | ||
R3 | Research channel 3 | deg and V | It is not clear there are valid data during 2005 | Data for 10 December 2009 - 16 December 2013 |
R4 | Research channel 4 | deg and cpm | CMP11 solarimeter in use for some of the time. It is not clear there are valid data during 2005 | Data for 10 December 2009 - 16 December 2013 |
R5 | Research channel 5 | deg | CMP11 solarimeter in use for some of the time. It is not clear there are valid data during 2005 | Data for 10 December 2008 - 14 December 2009; 15 May 2010 - 16 December 2013 |
R6 | Research channel 6 | deg | It is not clear there are valid data during 2005 | Intermittent data during 2009; data 14 May 2010-22 November 2012 |
R7 | Research channel 7 | deg | Used at times for RGH PRT project - Tair. It is not clear there are valid data during 2005 | Some data during 2007 (units: V); data available in 2008 but values are inconsistent; data available in 2009 to 16 December 2013 |
R8 | Research channel 8 | deg | Used at times by RGH PRT project - Tchk. It is not clear there are valid data during 2005 | Some data during 2007 (units: V); data available in 2008 - 2009 and from 1 January 2010 - 16 December 2013 |
R9 | Research channel 9 | deg | GDACS corrugated plate in use at times. It is not clear there are valid data during 2005 | Data available 15 July 2008 - 31 December 2008 |
Rain | Rainfall since 0000 clock time. | mm | The rainfall amount measured by a 0.2mm
resolution tipping bucket raingauge. A known problem is that this variable is reset to 0.0 mm upon reaching 25.0 mm; however, following the attainment of 25.0 mm observations are generally missing for about an hour. During 2005 data may be almost correct from 22 August onwards; however, there are many negative values, values that decrease over the five minute interval, and values that indicate the tipping rate is not every 0.2 mm. | 22 August 2009 - 26 July 2014 |
RGH Mic | V | 5 July 2006-7 December 2009 | ||
RH | Relative humidity | % | Measured using a Vaisala humidity probe | Generally valid data from 7 September 2006 - 27 March 2014 |
Rn | Net radiative flux density | W/m2 | The difference between the total downward radiation (longwave + shortwave) and the total upward radiation. This is measured using a NR Lite net radiometer mounted at 1.2m above the surface. | 12 August 2009-26 July 2014 |
RnT | Research channel 2 | degC | 8 February 2007-26 July 2014 | |
Sb | Direct beam radiative flux density | W/m2 | Measured with a pyheliometer. This instrument was fitted to our sun tracker and was automatically kept pointing directly at the sun. | 2-29 November 2006; data at times 11 June 2009 - 19 May 2014 |
Sd | Diffuse solar radiation (flux density) measured at 1.2m above the surface | W/m2 | Observed by a horizontal solarimeter, but one with a shade ring fitted to obstruct the direct beam. The position of the shade ring is adjusted manually throughout the year to ensure the solarimeter remains shaded. | 8 August 2005-19 May 2014 |
Sd new | W/m2 | 30 November 2006-1 December 2006 | ||
Sd band | Diffuse solar radiation | W/m2 | Zipp and Zonen CMP11 solarimeter with shade band. | 29 June 2010-23 November 2012; 25 May 2011-23 November 2012 |
Sd trk | Diffuse solar radiation (flux density) | W/m2 | Unlike the Sd measurement, this solarimeter is mounted on a new Kipp and Zonen sun tracker. The sun tracker automatically follows the path of the sun accurately throughout the day and a shading ball obstructs the direct beam from the horizontal solarimeter mounted on the tracker. | 1 January 2008-28 June 2010 |
Sdur | Sunshine duration | s | The amount of time during which the direct solar radiation exceeds a level of 120W/m2. Earlier values in 2005 are suspect. | 20 October 2005-31 December 2007; 9 June 2007-26 July 2014 |
Sg | Global solar radiation (flux density) measured at 1.2m above the surface | W/m2 | . | 8 August 2005-31 December 2006; 8 August 2007 - 24 July 2014 |
Soil moist10, Soil moist30, Soil moist50, Soil moist100 | Soil moisture at depths of 10, 30, 50 and 100 cm | % | There do not appear to be valid data in 2005. Delta T sensors were deployed during 2009 to measure the soil moisture content [CHECK THIS] | 50 cm moisture data present at times during 23 May 2011-14 September 2011 |
Sonic Dirn | Wind direction determined by sonic anemometer | deg | 8 March 2006-26 July 2014 | |
Sonic Magnitude | Wind speed determined by sonic anemometer | m/s | 8 March 2006-26 July 2014 | |
Sonic W | Vertical component of wind determined by sonic anemometer | m/s | 8 March 2006-26 July 2014 | |
Sout | Solar flux density reflected from the surface | W/m2 | Measured using the downward facing Pyranometer of the CNR1 4-component radiometer mounted at 1.2m above the surface | 8 May 2006-6 July 2014 |
Su | W/m2 | 8 August 2005-24 April 2006 | ||
Tconc | Temperature of the surface of a concrete slab | 8 August 2005- 6 March 2008; 19 April 2011-26 July 2014 | ||
Tdry | Air (dry bulb) temperature | degC | Measured at 1m height inside a Stevenson screen. | 17 August 2005-26 July 2014 |
Tgrass | Temperature at the grass tip level, the grass temperature | 8 August 2005-3 November 2007; 1 January-6 March 2008; 19 April 2011-26 July 2014 | ||
Tsoil | Soil surface temperature | 8 August 2005-2 March 2007 (with some missing periods); 19 April 2011-26 July 2014 | ||
Tsoil5 | Earth temperatures at depth of 5 cm | degC | Values earlier in 2005 and in december 2006 are clearly suspect | 20 October 2005-31 December 2006; no valid data during 2007; data 8 April 2011-26 July 2014 |
Tsoil10 | Earth temperatures at depth of 10 cm | degC | Values earlier in 2005 are clearly suspect; some suspect values during August 2007 | 20 October 2005-18 November 2008 (data suspect in second half of 2008); data 8 April 2011-26 July 2014 |
Tsoil20 | Earth temperatures at depth of 20 cm | degC | Values earlier in 2005 are clearly suspect | 20 October 2005-3 November 2006; data 8 April 2011-26 July 2014 |
Tsoil30 | Earth temperatures at depth of 30 cm | degC | Values earlier in 2005 are clearly suspect | 20 October 2005-3 November 2006; data 8 April 2011-26 July 2014 |
Tsoil50 | Earth temperatures at depth of 50 cm | degC | Values earlier in 2005 are clearly suspect; some suspect values during August 2007< | 20 October 2005-19 June 2009; data 8 April 2011-26 July 2014 |
Tsoil100 | Earth temperatures at depth of 100 cm | degC | Values earlier in 2005 are clearly suspect; some suspect values during August 2007< | 20 October 2005-18 November 2008 (data suspect in second half of 2008); data 8 April 2011-26 July 2014 |
Twet | Wet bulb temperature | degC | Measured at 1m height inside a Stevenson screen. | 17 August 2005-19 May 2015 |
U10 | Wind speed at 10m height | m/s | Earlier data for 2005 looks suspect | 8 September-26 July 2014 |
U2 | Wind speed at 2m height | m/s | Earlier data for 2005 looks suspect | 8 September-26 July 2014 |
U2 N/A | m/s | Data for 2005 looks suspect | ||
Vs | V | Some data available for 23 August-31 December 2007; data available throughout 2008 and to 7 December 2009 | ||
X | X | Some data available for 18 August-18 October 2005 |
Old web page address: http://www.met.rdg.ac.uk/~fsdata/res_b.html
23 Sep 99 KLA ______________ ChC1 Geiger counter1 ("No Poke" marked on case of instrument) 29 Sep 99 KLA _____________ ChB1 Geiger counter2 30 Sep 99 KLA/JRK _____________ ChB5 Geiger counter2 moved to ERL, patched through to Field Site for logging connections ChC1 FS Geiger counter 7 Oct 99 KLA/AGL ____________ Both Geiger counters disconnected 11 Oct 99 KLA _____________ ChB5 ERL Geiger counter ChC1 FS Geiger counter 12 Oct 99 KLA/AGL (1636) _________________ ChB7 FS Geiger counter 16 Oct 99 _________ ?Possible change: Geiger counters on B5 and B8? 7 April 00 _____________ ChC7 FS Geiger counter 21 June 00 RGH ___________ FS Geiger counter thought to be broken ***** Channel B card only now running ***************** 16 Oct 2002 SRT ______________ radiative sensors CH1 CM3 up CH2 CG3 up CH3 CM3 down CH4 CG3 down CH5 PRT CH6 new IR sensor CH7 new IR sensor 16 Jan 03. Curtis Wood/RGH ________________________ 16-Jan-03 ~ 22-Jan-03 B5 Dew Point Meter B6 FWPRT B7 ELEC_PSYC DRY B8 ELEC_PSYC WET 5 Jun 03. Curtis Wood/RGH ______________________ 5-Jun-03 ~ 16-Jun-03 B8 DPM B7 FWPRT B7 AMP-Y V = 0.2597R - 25.947 R = 3.8506V + 99.911 PRT12 (it broke, possibly due to rain between 8 and 11 June) From 11/05/00 to 08/06/03 Ro = 98.356 Ro.alpha = 0.3796 From 11-06-03 to 13-06-03 Ro = 98.682 Ro.alpha = 0.3582 18/06/03 - AGL/RGH/RJW ---------------------- Kipp and Zonen CNR1 connected (mounted on post1) ChB1 Sw out (x500 gain) ChB2 Lw in (x500 gain) ChB3 Sw in (x500 gain) ChB4 Lw out (x500 gain) ChB5 temp Research channel inputs now: ChB1 Sw out (x500 gain) ChB2 Lw in (x500 gain) ChB3 Sw in (x500 gain) ChB4 Lw out (x500 gain) ChB5 temp ChB6 N/C ChB7 N/C ChB8 N/C 19/08/03 - SRT/RJW ------------------ Geiger counter installed for testing (on ground under grey box) ChB6 Research channel inputs now: ChB1 Sw out (x500 gain) ChB2 Lw in (x500 gain) ChB3 Sw in (x500 gain) ChB4 Lw out (x500 gain) ChB5 temp ChB6 geiger ChB7 N/C ChB8 N/C 3:20 PM 10/17/2003 - AGL/SDG ---------------------------- 110V transformer supply installed in FTL for Arizona Gerdien supply. Geiger counter installed on 19/08/03 (above) removed. Kipp and Zonen CNR1 connections changed (mounted on post1). Sw out disconnected Sw in disconnected Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Arizona Gerdien (11V bias) ChB5 Geiger1 ChB6 Geiger2 ChB7 N/C ChB8 Coincidence NB. Mods to 8 way research connection box x500 amp modules disconnected from Ch3 and Ch4. +12V patched across to Ch3 and Ch4. 3:55 PM 10/20/2003 AGL/SDG -------------------------- All geigers removed from research channels Correlator returned to ERL for testing. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Arizona Gerdien (11V bias) ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 16:15 PM 10/22/2003 RGH / Tim Brazenor -------------------------------------- Arizona Gerdien bias voltage changed to 22V (was 11V). Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Arizona Gerdien (22V bias) ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 3:02 PM 10/23/2003 AGL ---------------------- Geigers re-connected Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Arizona Gerdien (22V bias) ChB5 Geiger1 (remote) ChB6 Geiger2 (on post1) ChB7 Geiger3 (on post1) ChB8 Coincidence 11:00 AM 27/11/2003 RJW ---------------------- Geiger 1 and 3 re-connected. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Arizona Gerdien (22V bias) ChB5 Geiger1 (on post1) ChB6 N/C ChB7 Geiger3 (on post1) ChB8 Coincidence 16:25 PM 05/12/2003 RJW ---------------------- Geiger 2 re-connected. Correlator disconnected. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Arizona Gerdien (22V bias) ChB5 Geiger1 (on post1) ChB6 Geiger2 (remote) ChB7 Geiger3 (on post1) ChB8 N/C 16:00 PM 08/12/2003 RJW ---------------------- Arizona Gerdien disconnected. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 N/C ChB5 Geiger1 (on post1) ChB6 Geiger2 (remote) ChB7 Geiger3 (on post1) ChB8 N/C 16:15 PM 09/12/2003 RJW ---------------------- correlator re-connected (inputs: Geigers 1 & 2). Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 N/C ChB5 Geiger3 (on post1) ChB6 Geiger1 (remote) ChB7 Geiger2 (on post1) ChB8 Coincidence 16:05 PM 18/12/2003 RJW ---------------------- correlator disconnected. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 N/C ChB5 Geiger3 (on post1) ChB6 Geiger1 (remote) ChB7 Geiger2 (on post1) ChB8 N/C 15:43 PM 19/12/2003 RJW ---------------------- correlator re-connected (inputs: Geigers 2 & 3). Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 N/C ChB5 Geiger3 (on post1) ChB6 Geiger1 (remote) ChB7 Geiger2 (on post1) ChB8 Coincidence 11:10 AM 03/02/2004 RJW ---------------------- correlator disconnected. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 N/C ChB5 Geiger3 (on post1) ChB6 Geiger1 (remote) ChB7 Geiger2 (on post1) ChB8 N/C 12:05 PM 09/02/2004 RJW ---------------------- correlator re-connected (inputs: Geigers 2 & 3). Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 N/C ChB5 Geiger3 (on post1) ChB6 Geiger1 (remote) ChB7 Geiger2 (on post1) ChB8 Coincidence 3:29 PM 3/22/2004 - AGL/SDG --------------------------- Passive wire installed on research CH4 Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Passive wire ChB5 Geiger3 (on post1) ChB6 Geiger1 (remote) ChB7 Geiger2 (on post1) ChB8 Coincidence 10:10 PM 3/26/2004 - ADG/SDG/RJW/AW Geigers removed from research channels and deployed on Polltrop logger box. Passive wire grounded. Sonde egg powered up with new sonde battery (not logged on res channels) Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 12:24 PM 3/26/2004 - AGL/SDG ---------------------------- Sonde egg powered down for insertion of R8. Sonde egg not logged on res channels so no change. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 12:36 PM 3/26/2004 - AGL/SDG ---------------------------- Sonde egg powered up - output variable up to 4.0V ! 2:55 PM 3/26/2004 -AGL/RJW -------------------------- Giegers and correlator moved physical location to post 2. Wire dsiconnected temporarily from chB4 the reconnected. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 temp ChB4 Passive wire ChB5 Geiger1 port (remote geiger) ChB6 Geiger2 port (geiger on post 2) ChB7 Geiger3 port (geiger on post 3) ChB8 Coincidence 12:07 PM 3/30/2004 - AGL ------------------------ Kipp CNR1 reconnected to B1 and B2 Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 N/C ChB4 Passive wire ChB5 Geiger1 port (remote geiger) ChB6 Geiger2 port (geiger on post 2) ChB7 Geiger3 port (geiger on post 3) ChB8 Coincidence 2:40 PM 3/30/2004 - AGL ----------------------- Arizona gerdien connected to chB3 sited on post 2. Inlet tube pointing due south. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 Arizona gerdien (Sensitivity reported to be ~1V/pA; bias voltage +22V) ChB4 Passive wire ChB5 Geiger1 port (remote geiger) ChB6 Geiger2 port (geiger on post 2) ChB7 Geiger3 port (geiger on post 3) ChB8 Coincidence 3:16 PM 4/5/2004 - AGL ---------------------- Remote geiger disconnected from cable Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 Arizona gerdien (Sensitivity reported to be ~1V/pA; bias voltage +22V) ChB4 Passive wire ChB5 N/C ChB6 Geiger2 port (geiger on post 2) ChB7 Geiger3 port (geiger on post 3) ChB8 Coincidence 2:00 PM 4/16/2004 - RJW ---------------------- All three geigers and correlator disconnected. Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 Arizona gerdien (Sensitivity reported to be ~1V/pA; bias voltage +22V) ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 3:45 PM 4/22/2004 - SDG ------------------------- Passive wire moved to other side of f/site, at 3:15 reconnected at 3:34 4:14 PM 4/23/2004 - SDG/AGL ---------------------------- Arizona gerdien removed Research channel inputs now: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 N/C ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 2:20 PM 5/13/2004 - SDG ------------------------ Kipp and Zonen CNR1 dis-connected Research channel inputs now: ChB1 N/C ChB2 N/C ChB3 N/C ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 3:23 PM 5/25/2004 - SDG ------------------------- Passive wire removed at 10.00, started logging again at 15.20 Research channel inputs still: ChB1 N/C ChB2 N/C ChB3 N/C ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 3:50 PM 06(June)/07/2004 - RJW ------------------------- Research channel inputs: PIMS and Geigers co-located on mast. ChB1 Passive wire ChB2 PIMS 008 / mode 2 / P42 (Vb = -19 V) ChB3 PIMS 009 / mode 2 / P207 (Vb = +19 V) ChB4 PIMS 010 / mode 2 / P44 (Vb = -19 V) ChB5 PIMS 011 / mode 2 / P205 (Vb = +19 V) ChB6 Geiger 1 (top) [G2 output] ChB7 Geiger 2 (bottom) [G3 output] ChB8 Correlator 11:05 AM 06(June)/08/2004 - RJW ------------------------- Research channel inputs: PIMS and Geigers co-located on mast. ChB1 Passive wire ChB2 PIMS 008 / mode 2 / P206 (Vb = +19 V) ChB3 PIMS 009 / mode 2 / P45 (Vb = -19 V) ChB4 PIMS 010 / mode 2 / P206 (Vb = +19 V) ChB5 PIMS 011 / mode 2 / P44 (Vb = -19 V) ChB6 Geiger 1 (top) [G2 output] ChB7 Geiger 2 (bottom) [G3 output] ChB8 Correlator 10:10 AM 06(June)/09/2004 - RJW ------------------------- Research channel inputs: PIMS removed. ChB1 Passive wire ChB2 N/C ChB3 N/C ChB4 N/C ChB5 N/C ChB6 Geiger 1 (top) [G2 output] ChB7 Geiger 2 (bottom) [G3 output] ChB8 Correlator 15:30 PM 06(June)/15/2004 - RJW ------------------------- Research channel inputs: 2 PIMS connected. ChB1 Passive wire ChB2 PIMS 011 / mode 2 / P45 (Vb = -20 V) ChB3 PIMS 008 / mode 2 / P45 (Vb ~ -20 V) ChB4 N/C ChB5 N/C ChB6 Geiger 1 (top) [G2 output] ChB7 Geiger 2 (bottom) [G3 output] ChB8 Correlator 09:15 AM 06(June)/17/2004 - RJW ------------------------- Research channel inputs: PIMS removed. ChB1 Passive wire ChB2 N/C ChB3 N/C ChB4 N/C ChB5 N/C ChB6 Geiger 1 (top) [G2 output] ChB7 Geiger 2 (bottom) [G3 output] ChB8 Correlator 10:08 29/07/2004 - AGL ---------------------- Research box changed for one with x500 gains on Ch2 and 3 Kipp CNR1 added (mounted on post 5) Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 N/C ChB6 Geiger 1 (top) [G2 output] ChB7 Geiger 2 (bottom) [G3 output] ChB8 Correlator 15:00 02/08/2004 - RJW ---------------------- Geiger tubes and Correlator disconnected and connected to logger box. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 10:35 03/08/2004 - RJW ---------------------- Correlator and all Geiger tubes re-connected. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Geiger 3 [G1 output] ChB6 Geiger 1 (top) [G2 output] ChB7 Geiger 2 (bottom) [G3 output] ChB8 Correlator 10:20 06/08/2004 - RJW ---------------------- Geiger tubes and Correlator disconnected and connected to logger box. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 N/C 3:13 PM 8/12/2004 - AGL ---------------------- FWPRT/amp combination 01/H (in stevenson screen) connected to ChB8. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 screen FWPRT (screen temperature for RGH) 10:00 13/08/2004 - RJW ---------------------- Correlator and 2 Geiger tubes re-connected. FWPRT/amp combination 01/H (now outside screen) connected to ChB8. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Geiger 1 (top) [G2 output] ChB6 Geiger 2 (bottom) [G3 output] ChB7 Correlator ChB8 FWPRT (outside temp for RGH) 16:00 03/09/2004 - RJW ---------------------- All Geigers and correlator removed from field site system and connected to ADLOG logger box. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 N/C ChB6 N/C ChB7 N/C ChB8 FWPRT (outside temp for RGH) 12:00 6/09/2004 - RGH ---------------------- Clear sky conditions. Photodiode amplifier connected to B7. NB 1. Geigers and correlator were disconnected and are being logged on a different system. NB 2. PRT amp for CNR1 had become disconnected - this was re-fitted to B3. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 ChB6 ChB7 Photodiode ChB8 FWPRT (outside temp for RGH) 09:00 7/09/2004 - RGH ---------------------- Photodiode amplifier removed from B7. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 ChB6 ChB7 ChB8 FWPRT (outside temp for RGH) 11:00 10/09/2004 - RJW ---------------------- Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Correlator (correlating Geiger1,top & Geiger3,bottom [G3 output]) ChB6 Geiger 1 (top) [G2 output] ChB7 ChB8 FWPRT (outside temp for RGH) 14:30-16:30 13/09/2004 - SRT/RJW ---------------------- Geiger testing performed by SRT between 14:30-16:30 Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Correlator (correlating Geiger1,top & Geiger2,bottom [G1 output]) ChB6 Geiger 1 (top) [G2 output] ChB7 ChB8 FWPRT (outside temp for RGH) 0930-1730 24/09/2004 - RGH ---------------------- PIMS008 used on field site, aligned with inlet at SW. Powered from B7, so analogue signal available, but logged with a laptop running PIMSPECT, and configuration file PIMS008.CFG. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Correlator (correlating Geiger1,top & Geiger2,bottom [G1 output]) ChB6 Geiger 1 (top) [G2 output] ChB7 PIMS008 ChB8 FWPRT (outside temp for RGH) 17:30-18:00 24/09/2004 - RGH/KLA ---------------------- Comparison of Reading Geigers/correlator and RAL Geigers/correlator. Reading Geigers 1 and 2 above each other (G1 uppermost) on Eastward mast, RAL Geigers strapped above Reading Geiger 3, on North facing mast. RAL1 uppermost, RAL2 next, Geiger 3 lowest. (RAL using pulse counting channels, and correlator on a Campbell). Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Correlator (correlating Geiger1,top & Geiger2,bottom [G1 output]) ChB6 Geiger 1 (top) [G2 output] ChB7 Geiger 3 ChB8 Geiger 2 17:30-18:20 30/09/2004 - AGL/RGH ---------------------- Further comparison of Reading Geigers/correlator and RAL Geigers/correlator. Three Reading Geigers re-installed about 1730. RAL and Reading Campbell loggers (both 12v powered) synchronised to laptop at 1820. On the Reading one (data file Geigers.dat), the channels are "battery", G1, G2, G3, pulse Geiger 1, PG2, PG3 where G1...G3 are the ratemeter voltage outputs. On the RAL one, the data file is Geiger.dat. Mounted on the one arm (east), going upwards are Geiger 3, Geiger 1, RAL1 and RAL2: the other arm (north) has Geiger 2. (Note that this is different to the arrangement last weekend.) The Reading coincidence detector (G1&G3) is on B5 of http://www.met.rdg.ac.uk/~fsdata/res_b.html . Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Correlator (correlating Geiger1,top & Geiger3,bottom) ChB6 ChB7 ChB8 0930-1250 7/10/2004 - RGH ---------------------- 0930-1250 RAL Geiger counters removed for repairs. 1125 Arizon Gerdien bias battery checked, and cells changed. Bias voltage +19.4V. Operating on B8. 1250 Reading Geigers altered: Geigers 1 and 3 (east) rotated so tubes horizontal, 24.5cm separation. Geiger 2 kept vertical. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Correlator (correlating Geiger1,top & Geiger3,bottom) ChB6 ChB7 ChB8 Arizona Gerdien 1030-1040 8/10/2004 - RGH ---------------------- 1030 Geigers 1 and 3 (east) moved closer, 11cm separation. G2 now connected to B7, as well as continuing on Campbell. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 Correlator (correlating Geiger1,top & Geiger3,bottom) ChB6 ChB7 Geiger 2 ratemeter. ChB8 Arizona Gerdien 16:15 20/10/2004 - RJW ---------------------- Geigers 1 & 3 removed to dry out in Lab. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 ChB6 ChB7 Geiger 2 ratemeter. ChB8 Arizona Gerdien 2:44 PM 11/5/2004 - SDG ------------------------ Geiger 2 removed at 9.00 and repaired by SRT replaced at 2.45 Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 ChB6 Geiger 2 ratemeter. ChB7 ChB8 Arizona Gerdien 2:35 PM 11/10/2004 - RJW ------------------------ Geiger 1 (top) & Geiger 3 (bottom) re-connected to Campbell logger. Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out(x500 gain) ChB3 CNR1 body temperature ChB4 Passive wire ChB5 ChB6 Geiger 2 ratemeter. ChB7 ChB8 Arizona Gerdien 2:20 PM 11/15/2004 - AGL/SDG/RJW -------------------------------- Geiger mast moved to north side of site. Arizona gerdien moved to north side of site. Passive wire temporarily dismanteled Geiger 1 (top) & Geiger 3 (bottom) re-connected to Campbell logger. CNR1 disconnected from research channels Passive wire disconnected from research channels Research channel inputs: ChB1 N/C ChB2 N/C ChB3 N/C ChB4 N/C ChB5 Correlator output (geigers 1 and 3) ChB6 Geiger 2 ratemeter. ChB7 N/C ChB8 Arizona Gerdien 10:52 AM 11/17/2004 SDG AGL ---------------------------- Air/earth Current plate added Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Air/earth plate ChB4 N/C ChB5 Correlator output (geigers 1 and 3) ChB6 Geiger 2 ratemeter. ChB7 N/C ChB8 Arizona Gerdien 15:20 AM 11/17/2004 RJW ---------------------------- Geiger 2 connected to Campbell logger (and also Ch B6) so that all 3 Geigers are now logged by the Campbell. Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Air/earth plate ChB4 N/C ChB5 Correlator output (geigers 1 and 3) ChB6 Geiger 2 ratemeter. ChB7 N/C ChB8 Arizona Gerdien 12:10 AM 11/26/2004 RJW ---------------------------- Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 3) 0.5 m (Geiger 1) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Air/earth plate ChB4 N/C ChB5 Correlator output (geigers 1 and 3) ChB6 Geiger 2 ratemeter. ChB7 N/C ChB8 Arizona Gerdien 16:00 PM 11/26/2004 AGL SDG AB RJW ---------------------------- Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 3) 0.5 m (Geiger 1) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Air/earth plate ChB4 Field mill ChB5 Correlator output (geigers 1 and 3) ChB6 Geiger 2 ratemeter. ChB7 N/C ChB8 Arizona Gerdien 14:55 PM 11/29/2004 RJW ---------------------------- Arizona removed for cleaning Geiger 3 removed & replaced by Geiger 1. Correlator also removed for drying. Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 1) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Air/earth plate ChB4 Field mill ChB5 N/C ChB6 Geiger 2 ratemeter. ChB7 N/C ChB8 N/C 14:45 PM 12/02/2004 RJW ---------------------------- Arizona re-connected Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 1) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Air/earth plate ChB4 Field mill ChB5 N/C ChB6 Geiger 2 ratemeter. ChB7 N/C ChB8 Arizona Gerdien 17:30 PM 12/02/2004 RJW AB ---------------------------- Air/Earth plate moved from ChB3 to ChB7 Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 1) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 N/C ChB4 Field mill ChB5 N/C ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien 14:15-14:45 PM 12/03/2004 RJW RGH ---------------------------- Geiger 3 re-connected to Campbell, re-orientation of Geigers and connection of Geiger 2 and 1 to field site system. Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 1) 0.5 m (Geiger 3) 1 m (Geiger 2) Geigers 1 & 3 are correlating. Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 1 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +22 V) 10:45 AM 12/09/2004 RJW ---------------------------- Change in correlated geigers [Geigers 2 & 3 are now correlating]. Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 1) 0.5 m (Geiger 3) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +22 V) 11:15 AM 12/13/2004 RJW ---------------------------- Change in Arizona Gerdien bias voltage from +22 V to +11 V. Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 1) 0.5 m (Geiger 3) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 14:20 PM 12/17/2004 RJW ---------------------------- Change in separation of Geigers. Geigers arranged in a vertical profile, with heights of: 0.25 m (Geiger 1) 0.35 m (Geiger 3) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 14:40 AM 12/20/2004 RJW ---------------------------- Change in separation of Geigers. Geiger 1 is not in vertical alignment with Geigers 2 & 3. Geigers arranged in a vertical profile, with heights of: 0.5 m (Geiger 1) 0.25 m (Geiger 3) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 11:00 AM 22/12/2004 SDG RJQ ------------------------------ Kipp and Zonen CNR1 connected on 1m mast, output 2 from kipp box going to chB1, and output 4 going to chB2 Research channel inputs: ChB1 Lw in (x500 gain) ChB2 Lw out (x500 gain) ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 12:15 AM 05/01/2005 RJW ---------------------------- Change in separation of Geigers. Geiger 1 is not in vertical alignment with Geigers 2 & 3. Geigers arranged in a vertical profile, with heights of: 0.5 m (Geiger 1) 0.75 m (Geiger 3) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 14:40 21/01/2005 RGH ---------------------------- Running PIMS2-008 on top of Arizona Gerdien box. Tosh 2110 Laptop in logger box, running PIMSPECT, using voltage steps from HVN08.CFG. PIMS powered from 6W system, using B6, hence Geiger 2 ratemeter disconnected Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 PIMS2-008 ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 09:30 26/01/2005 RGH ---------------------------- Changed PIMS2-008 for PIMS2-011. Using PIMS011.cfg (renamed from PIMS008.cfg), with standard bipolar DAC. Geigers arranged in a vertical profile, with heights of: 0.5 m (Geiger 1) 0.91 m (Geiger 3) 1 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 PIMS2-011 ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 16:10 25/02/2005 RJW ---------------------------- Change in Geiger arrangement: Geigers arranged in a vertical profile, with heights of: 1.0 m (Geiger 1) 0.25 m (Geiger 3) 1.25 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 PIMS2-011 ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 11:00 03/03/2005 RJW ---------------------------- Change in Geiger arrangement: Geigers arranged in a vertical profile, with heights of: 0.5 m (Geiger 1) 0.7 m (Geiger 3) 1.0 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 PIMS2-011 ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 17:15 03/03/2005 RJW ---------------------------- Change in Geiger arrangement: Geigers arranged in a vertical profile, with heights of: 1.0 m (Geiger 1) 0.7 m (Geiger 3) 1.0 m (Geiger 2) Research channel inputs: ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 PIMS2-011 ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 28/04/2005 AGL Kipp CNR1 removed (apparently not connected anyway) and mast moved pending field site pracs ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 PIMS2-011 ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 09/05/2005 RJW Geiger 2 connected. ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 Arizona Gerdien (Vb = +11 V) 10:53 AM 5/10/2005 SDG Arizona Gerdien removed and passive wire added to Ch8 ChB1 N/C ChB2 N/C ChB3 Correlator output (geigers 2 and 3) ChB4 Field mill ChB5 Geiger 1 ratemeter. ChB6 Geiger 2 ratemeter. ChB7 Air/earth plate ChB8 passive wire 16:15 PM 5/12/2005 RJW Geigers & Coincidence detector removed for drying. ChB1 N/C ChB2 N/C ChB3 N/C ChB4 Field mill ChB5 N/C ChB6 N/C ChB7 Air/earth plate ChB8 passive wire 12:00 PM 5/17/2005 RJW Geigers & Coincidence detector re-connected after circuitry replacement. ChB1 N/C ChB2 N/C ChB3 coincidence detector ChB4 Field mill ChB5 Geiger 1 ChB6 Geiger 3 ChB7 Air/earth plate ChB8 passive wire 15:00 PM 5/24/2005 RJW Geiger3 removed. ChB1 N/C ChB2 N/C ChB3 coincidence detector ChB4 Field mill ChB5 Geiger 1 ChB6 N/C ChB7 Air/earth plate ChB8 passive wire 11:45 PM 5/25/2005 RJW Geiger2 connected after circuitry replacement. ChB1 N/C ChB2 N/C ChB3 coincidence detector ChB4 Field mill ChB5 Geiger 1 ChB6 Geiger 2 ChB7 Air/earth plate ChB8 passive wire 12:00 PM 5/26/2005 RJW Replaced Geiger2 with Geiger3 connected. ChB1 N/C ChB2 N/C ChB3 coincidence detector ChB4 Field mill ChB5 Geiger 1 ChB6 Geiger 3 ChB7 Air/Earth plate ChB8 passive wire 11:15 PM 6/09/2005 AJB Replaced Air/earth plate with border plate picoammeter ChB1 N/C ChB2 N/C ChB3 coincidence detector ChB4 Field mill ChB5 Geiger 1 ChB6 Geiger 3 ChB7 Border plate of air/earth current resolver ChB8 passive wire 9:46 AM 7/14/2005 AGL / SDG Installed passive wire on S side of posts ChB1 N/C ChB2 N/C ChB3 coincidence detector ChB4 Field mill ChB5 Geiger 1 ChB6 Geiger 3 ChB7 Border plate of air/earth current resolver ChB8 passive wire 10:57 19/07/2005 RGH / SDG / AGL Installed CNR1 on B1 and B2 Installed new small range passive sphere on CNR1 mounting on B8 ChB1 Lw in (x500 gain) ChB2 Lw out (x500 gain) ChB3 coincidence detector ChB4 Field mill ChB5 Geiger 1 ChB6 Geiger 3 ChB7 Border plate of air/earth current resolver ChB8 small range passive sphere 10:45 20/07/2005 RGH Removed small range passive sphere on CNR1 mounting Reconnected passive wire ChB1 Lw in (x500 gain) ChB2 Lw out (x500 gain) ChB3 coincidence detector ChB4 Field mill ChB5 Geiger 1 ChB6 Geiger 3 ChB7 Border plate of air/earth current resolver ChB8 passive wire (at 1m) 14:36 01/08/2005 AGL All reserved channels shutdown for redeployment of masts ChB1 Lw in (x500 gain) ChB2 Lw out (x500 gain) ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 NC ChB6 NC ChB7 NC ChB8 NC 15:49 02/08/2005 AGL/SDG New arrangement of instruments by air/earth current resolver CNR1 mast approx 1m W of resolver Field mill approx 1m E of resolver Geiger mast approx 2m NNE of resolver Channels now ChB1 Lw in (x500 gain) ChB2 Lw out (x500 gain) ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 - ChB6 - ChB7 - ChB8 - 15:35 15/08/2005 AGL Passive wire installed on ch B5 Channels now ChB1 Lw in (x500 gain) ChB2 Lw out (x500 gain) ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Passive wire ChB6 - ChB7 - ChB8 - 15:20 18/08/2005 AJB Geiger counters 1 and 3 added Channels now ChB1 Lw in (x500 gain) ChB2 Lw out (x500 gain) ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Passive wire ChB6 Geiger 1 ChB7 - ChB8 Geiger 3 17:35 05/09/2005 AJB Coincidence detector added Channels now ChB1 Lw in (x500 gain) ChB2 Lw out (x500 gain) ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Passive wire ChB6 Geiger 1 ChB7 Geiger 3 ChB8 Coincidence detector 14:56 08/09/2005 AGL Kipp CNR1 removed Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Passive wire ChB6 Geiger 1 ChB7 Geiger 3 ChB8 Coincidence detector 17:08 06/10/2005 AJB Air-Earth current pyramid plates connected. Passive wire disconnected. Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Pyramid plate of air/earth current resolver ChB5 Border plate of air/earth current resolver ChB6 Geiger 1 ChB7 Geiger 3 ChB8 Coincidence detector 14:48 07/10/2005 AJB Air-Earth current pyramid plates swapped, Geiger 1 in for repair. Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 N/A ChB7 Geiger 3 ChB8 Coincidence detector 10:43 13/10/2005 AJB Geiger 2 replaced geiger 1 position on chB6 as part of cosmic telescope. Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Geiger 2 ChB7 Geiger 3 ChB8 Coincidence detector 11:03 27/10/2005 AJB Geiger 3 replaced with passive wire Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Geiger 2 ChB7 Passive Wire ChB8 Coincidence detector 12:55 27/10/2005 AJB Coincidence detector replaced with Arizona Gerdien (Voltage follower exp) Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Geiger 2 ChB7 Passive Wire ChB8 Arizona Gerdien 15:20 14/11/2005 AJB Arizona Gerdien replaced with Snowdon-type PG sensor Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Geiger 2 ChB7 Passive Wire ChB8 Snowdon-type PG sensor 11:00 29/11/2005 AJB Snowdon-type PG sensor removed Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Geiger 2 ChB7 Passive Wire ChB8 N/A 11:00 18/01/2006 AJB Geiger2 Added after repair Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Geiger 2 ChB7 Passive Wire ChB8 N/A 15:20 02/05/2006 AJB Pyramid plate disconnected and picoammeter connected to PTFE insulator (leakage comparison) Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 leakage monitor (picoammeter connected to PTFE insulator) ChB6 Geiger 2 ChB7 Passive Wire ChB8 N/A 16:35 03/05/2006 AJB Pyramid plate reconnected Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Geiger 2 ChB7 Passive Wire ChB8 N/A 10:55 18/05/2006 AJB AECP plates disconnected and left floating (and insulated) for leakage test Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 leakage testing ChB5 leakage testing ChB6 Geiger 2 ChB7 Passive Wire ChB8 N/A 13:45 18/05/2006 AJB AECP plates reconnected Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Geiger 2 ChB7 Passive Wire ChB8 N/A 13:45 15/06/2006 AJB Mobile flat plate added to B6 Channels now ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Mobile flat flate ChB7 Passive Wire ChB8 N/A 13:55 to 15:30 16/06/2006 RGH Tests on ELF/VLF noise No changes to logging, but passive wire disconnected 1355 to 1525 for different tests. Some tests made on AECP, border plate and AECP2 during this period too. 12:55 PM 23/06/2006 SDG added bilog amp to chb8 for testing 10:49 AM 10/07/2006 SDG changed flat plate on chb8 to new channel plate ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 Mobile channel plate ChB7 Passive Wire ChB8 corona log sensor 11:00 AM 14/07/2006 (?) AJB corrugated and flat mobile AECP plates installed on channels B6 and B7 respectively. ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 corrigated plate (mob) ChB7 flat plate (mob) ChB8 corona log sensor 14:15 22/08/2006 AJB replaced corona log sensor with Passive Wire on B8. ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 corrigated plate (mob) ChB7 flat plate (mob) ChB8 Passive Wire 12:00 14/09/2006 AJB installed heated FP. ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 corrigated plate (mob) ChB7 flat plate (mob) - heated. ChB8 Passive Wire 18:00 18/09/2006 AJB installed heated FP and heated CP (using mast power supply). ChB1 N/A ChB2 N/A ChB3 Field mill ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 corrigated plate (mob) - heated ChB7 flat plate (mob) - heated ChB8 Passive Wire 10:00 16/01/2007 16:30 Field mill removed from B3 (PG now measured only on fidas system) ChB1 N/A ChB2 N/A ChB3 N/A ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 corrigated plate (mob) - heated ChB7 flat plate (mob) - heated ChB8 Passive Wire 10:00 31/01/2007 AJB Heater wire for mob plates changed to Ni-Cr. ChB1 N/A ChB2 N/A ChB3 N/A ChB4 Border plate of air/earth current resolver ChB5 Pyramid plate of air/earth current resolver ChB6 corrigated plate (mob) - heated ChB7 flat plate (mob) - heated ChB8 Passive Wire 12:30 22/08/2008 RJW/AGL corrugated and flat mobile plates moved onto METFiDAS