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fix(weather-sat): lower default gain to 30 dB to prevent ADC saturation

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Strong passes at 40 dB (the previous default) cause RTL-SDR ADC clipping,
producing a distorted IQ stream that SatDump cannot lock onto. 30 dB is
a safer starting point that still captures weak passes cleanly.

Also adds a UI hint below the gain control explaining the saturation issue.

Closes #185
This commit is contained in:
James Smith
2026-04-05 14:20:06 +01:00
parent 6572119360
commit 6ea34a4c60
3 changed files with 215 additions and 214 deletions
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config.py
+1 -1
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@@ -459,7 +459,7 @@ SATELLITE_TRAJECTORY_POINTS = _get_env_int('SATELLITE_TRAJECTORY_POINTS', 30)
SATELLITE_ORBIT_MINUTES = _get_env_int('SATELLITE_ORBIT_MINUTES', 45)
# Weather satellite settings
WEATHER_SAT_DEFAULT_GAIN = _get_env_float('WEATHER_SAT_GAIN', 40.0)
WEATHER_SAT_DEFAULT_GAIN = _get_env_float('WEATHER_SAT_GAIN', 30.0)
WEATHER_SAT_SAMPLE_RATE = _get_env_int('WEATHER_SAT_SAMPLE_RATE', 2400000)
WEATHER_SAT_MIN_ELEVATION = _get_env_float('WEATHER_SAT_MIN_ELEVATION', 15.0)
WEATHER_SAT_PREDICTION_HOURS = _get_env_int('WEATHER_SAT_PREDICTION_HOURS', 24)