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Fix weather sat 0dB SNR: increase sample rate to 2.4 MHz for Meteor LRPT

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The default 1 MHz sample rate was too low for SatDump's meteor_m2-x_lrpt
pipeline, causing NOSYNC and 0.000dB SNR. Bumped to 2.4 MHz (SatDump
recommendation) and wired up the WEATHER_SAT_SAMPLE_RATE config value
so it actually gets passed to decoder.start() from both the auto-scheduler
and manual start route.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-02-24 20:27:08 +00:00
parent b3af44652f
commit 0afa25e57c
4 changed files with 108 additions and 99 deletions
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2
config.py
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@@ -331,7 +331,7 @@ SATELLITE_ORBIT_MINUTES = _get_env_int('SATELLITE_ORBIT_MINUTES', 45)
# Weather satellite settings # 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', 40.0)
WEATHER_SAT_SAMPLE_RATE = _get_env_int('WEATHER_SAT_SAMPLE_RATE', 1000000) 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_MIN_ELEVATION = _get_env_float('WEATHER_SAT_MIN_ELEVATION', 15.0)
WEATHER_SAT_PREDICTION_HOURS = _get_env_int('WEATHER_SAT_PREDICTION_HOURS', 24) WEATHER_SAT_PREDICTION_HOURS = _get_env_int('WEATHER_SAT_PREDICTION_HOURS', 24)
WEATHER_SAT_SCHEDULE_REFRESH_MINUTES = _get_env_int('WEATHER_SAT_SCHEDULE_REFRESH_MINUTES', 30) WEATHER_SAT_SCHEDULE_REFRESH_MINUTES = _get_env_int('WEATHER_SAT_SCHEDULE_REFRESH_MINUTES', 30)

2
routes/weather_sat.py
View File

@@ -18,6 +18,7 @@ from utils.weather_sat import (
is_weather_sat_available, is_weather_sat_available,
CaptureProgress, CaptureProgress,
WEATHER_SATELLITES, WEATHER_SATELLITES,
DEFAULT_SAMPLE_RATE,
) )
logger = get_logger('intercept.weather_sat') logger = get_logger('intercept.weather_sat')
@@ -164,6 +165,7 @@ def start_capture():
satellite=satellite, satellite=satellite,
device_index=device_index, device_index=device_index,
gain=gain, gain=gain,
sample_rate=DEFAULT_SAMPLE_RATE,
bias_t=bias_t, bias_t=bias_t,
) )

6
utils/weather_sat.py
View File

@@ -85,7 +85,11 @@ WEATHER_SATELLITES = {
} }
# Default sample rate for weather satellite reception # Default sample rate for weather satellite reception
DEFAULT_SAMPLE_RATE = 1000000 # 1 MHz try:
from config import WEATHER_SAT_SAMPLE_RATE as _configured_rate
DEFAULT_SAMPLE_RATE = _configured_rate
except ImportError:
DEFAULT_SAMPLE_RATE = 2400000 # 2.4 MHz — minimum for Meteor LRPT
@dataclass @dataclass

3
utils/weather_sat_scheduler.py
View File

@@ -21,10 +21,12 @@ try:
from config import ( from config import (
WEATHER_SAT_SCHEDULE_REFRESH_MINUTES, WEATHER_SAT_SCHEDULE_REFRESH_MINUTES,
WEATHER_SAT_CAPTURE_BUFFER_SECONDS, WEATHER_SAT_CAPTURE_BUFFER_SECONDS,
WEATHER_SAT_SAMPLE_RATE,
) )
except ImportError: except ImportError:
WEATHER_SAT_SCHEDULE_REFRESH_MINUTES = 30 WEATHER_SAT_SCHEDULE_REFRESH_MINUTES = 30
WEATHER_SAT_CAPTURE_BUFFER_SECONDS = 30 WEATHER_SAT_CAPTURE_BUFFER_SECONDS = 30
WEATHER_SAT_SAMPLE_RATE = 2400000
class ScheduledPass: class ScheduledPass:
@@ -330,6 +332,7 @@ class WeatherSatScheduler:
satellite=sp.satellite, satellite=sp.satellite,
device_index=self._device, device_index=self._device,
gain=self._gain, gain=self._gain,
sample_rate=WEATHER_SAT_SAMPLE_RATE,
bias_t=self._bias_t, bias_t=self._bias_t,
) )