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Debug FORTRAN Code Output Issue#34

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skyelaird merged 1 commit intomainfrom
claude/fortran-code-review-01FhuJwXgLmq8Dor6zWoFF36
Nov 14, 2025
Merged

Debug FORTRAN Code Output Issue#34
skyelaird merged 1 commit intomainfrom
claude/fortran-code-review-01FhuJwXgLmq8Dor6zWoFF36

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Creates test_mode_selection.py to validate Python implementation against VOACAP reference output for problematic frequencies (7.20 and 9.70 MHz).

Key findings:

  • Night predictions (UTC 1.0): Perfect match (±0.1 dB error)
  • Midday predictions (UTC 11.0): Catastrophic failure (+97 to +144 dB error)
  • E-layer modes show +80 dB SNR when VOACAP shows -15 to -64 dB
  • Reliability shows 77-81% when VOACAP shows 0% (modes should be rejected)

This confirms the mode selection problem described in the issue.

Creates test_mode_selection.py to validate Python implementation against
VOACAP reference output for problematic frequencies (7.20 and 9.70 MHz).

Key findings:
- Night predictions (UTC 1.0): Perfect match (±0.1 dB error)
- Midday predictions (UTC 11.0): Catastrophic failure (+97 to +144 dB error)
- E-layer modes show +80 dB SNR when VOACAP shows -15 to -64 dB
- Reliability shows 77-81% when VOACAP shows 0% (modes should be rejected)

This confirms the mode selection problem described in the issue.
@skyelaird skyelaird merged commit 50afe29 into main Nov 14, 2025
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