finite difference TL/AD ctest #280
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BenjaminTJohnson
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chengdang
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Jan 15, 2026
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chengdang
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These new tests are working as expected!
Start 193: test_FD_consistency_atms_n21
190/196 Test #193: test_FD_consistency_atms_n21 ..................... Passed 0.39 sec
Start 194: test_AD_consistency_atms_n21
191/196 Test #194: test_AD_consistency_atms_n21 ..................... Passed 0.02 sec
Start 195: test_FD_consistency_cris-fsr_n21
192/196 Test #195: test_FD_consistency_cris-fsr_n21 ................. Passed 0.26 sec
Start 196: test_AD_consistency_cris-fsr_n21
I only have a couple of minor questions on the tolerance value, otherwise I think this is ready to merge.
| RTSolution(l,PROFILE_IDX)%Radiance | ||
| tl = RTSolution_TL(l,PROFILE_IDX)%Radiance | ||
| diff = ABS(fd - tl) | ||
| tol = ATOL + RTOL * MAX(ABS(fd), ABS(tl)) |
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Do we know why is this tol defined this way?
| INTEGER :: arg_count | ||
| REAL(fp) :: fd, tl, diff, tol, max_diff | ||
| REAL(fp) :: lhs, rhs, rel | ||
| REAL(fp), PARAMETER :: AD_RTOL = 1.0e-3_fp |
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Same here, I'm sure there are some scientific basics for setting up these, could be empirical?
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Adding a new finite‑difference consistency test to the ctest suite and wired it to run TL‑FD and TL‑AD checks. The test prints per‑channel deltas, uses the existing in‑code profile/surface data (no extra binaries), and is enabled for atms_n21 and cris-fsr_n21.
v.abi_g19 is included only if its coeffs are present.