======================================================================== 4dVar (Double Pendulum) Input File ======================================================================== ====== General Parameters ============================================== --Status ('MakeObs' to invent observations, 'Analyse' to do 4dVar) MakeObs --Dimensions of pendulum (l1,l2,l3, metres) 0.1, 0.2, 0.15 --Masses of pendulum nodes (m1,m2,m3, kg) 0.1, 0.1, 0.1 --Acceleration due to gravity (m/s/s) 10.0 --Time step (seconds) 0.001 --Length of integration (time steps) 5000 --Model state (initial guess(Analyse) or initial conditions(MakeObs)) --angle 1,angle 2, roc angle 1, roc angle 2 (deg and deg/s) 160.0, 100.0, -350.0, 100.0 ======================================================================== ====== MakeObs Parameters ============================================== --Frequency of observation output (used only for MakeObs) 50 --Noise for angles (deg, used only for MakeObs) 5.0 --Noise for roc angles (deg/s used only for MakeObs) 0.0 ======================================================================== ====== Analyse Parameters ============================================== --Size of each observation window (time steps) 500 --Observations (used only for Analyse) --Value, type (1,2,3,4), error, time (sec) ------------------------------------------------------------------------ 000.00, 0, 000.00, 000.00 ------------------------------------------------------------------------ ========================================================================