Initial tests 13a for the GCR (balanced variable)

• RHS PV is raw data.
• Grid-only PV (not grid/normal mode hybrid).
• The first guess is streamfunction after vertical regression (Gp).
• Diagonal preconditioning.
• 5000 iterations (restart 5).
• Mass weighted inner product for GCR coefficients.
• Data location /export/custard/disk-01/ross/PV_Results/GCR_Test/PV/RevisedTest/CheckModes

• The extra mode PV is computed from the streamfunction result from test 13
• This is compared against the RHS PV modes.
• Comparisons are also shown for the initial guess streamfunction, and the result of the hybrid (grid+extra mode) inversion (run 14).

1. The PV modes of the 'RHS' (ref: PV_RHS)

2. The PV modes of the initial guess (before GCR) (ref: PV_init)

3. The PV modes of the GCR run with hybrid PV (as Run 14) (ref: PV_hybrid)

4. The PV modes of the GCR run with grid-only PV (ref: PV_grid)

5. The difference between the initial guess PV and the RHS PV (ref: Diff_init)

6. The difference between the hybrid PV GCR run PV and the RHS PV (ref: Diff_hybrid)

7. The difference between the grid-only PV GCR run PV and the RHS PV (ref: Diff_grid)