|
WEATHER
SATELLITES
Weather satellites that transmit in
the 137 MHz band
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Table
of weather satellites that transmit in the 137 MHz band, commonly
received by hobbyists using SDR receivers and SatDump software.
These satellites primarily transmit APT (Automatic Picture
Transmission) or LRPT (Low Rate Picture Transmission) data, which
SatDump can decode.
|
|
Frequency
(MHz)
|
Decode
Protocol
|
Notes
|
|
NOAA
15
|
137.62
|
APT
|
Active,
strong signal, image quality OK
|
|
NOAA
19
|
137.1
|
APT
|
Active,
good backup to NOAA 18
|
|
Meteor
M2-2
|
137.9
|
LRPT
|
Often
active, high-resolution images
|
|
Meteor
M2-3
|
137.100
– 137.900
|
LRPT
|
May
share frequencies
|
Notes
for SatDump Users
Pass
Prediction Tools
To
predict when the satellite will be overhead:
General
SatDump Settings
|
Setting
|
Recommended
Value
|
|
Sample
rate
|
2.048
MSPS (or up to 2.56 MSPS for RTL-SDR)
|
|
Gain
|
Manual,
40–49 dB (experiment)
|
|
Input
device
|
RTL-SDR,
AirSpy, SDRPlay, HackRF, etc.
|
|
Recording
length
|
Match
pass duration (10–15 min)
|
|
Center
frequency
|
Based
on satellite (see below)
|
|
Filter
bandwidth
|
40
kHz (APT), 150 kHz (LRPT)
|
NOAA
APT (NOAA 15, 19) Configuration
|
Parameter
|
Value
|
|
Satellite
|
NOAA
15 and 19
|
|
Frequency
|
137.100,
137.620, 137.9125
|
|
Demodulator
|
FM
|
|
Decoder
|
APT
|
|
Sample
rate
|
2.048
MSPS or 2.4 MSPS
|
|
Mode
|
Real-time
or IQ recording
|
| FM
filter width |
40
kHz |
|
Output
|
.png
image with overlays
|
NOAA
Satellite Status: POES
Performance Status | OSPO
Meteor
M2-2 / M2-3 (LRPT) Configuration
|
Parameter
|
Value
|
|
Satellite
|
Meteor
M2-2 and M2-3
|
|
Frequency
|
137.900
(M2-2), variable (M2-3)
|
|
Demodulator
|
QPSK
|
|
Decoder
|
LRPT
|
|
Sample
rate
|
2.4
– 2.56 MSPS
|
|
Bandwidth
|
140–160
kHz
|
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OF PAGE
Page initiated 4 July,
2025
Page
last revised 4 July,
2025
|
