SATELLITE SOFTWARE
APT ( automatic picture transmissions ) reception from weather satellites can be achieved with modest equipment you will need to know where the satellites are to listen to them, there a various programs out there to help you do that. a scanner receiver will give you some results, but the bandwidth on the majority of them is to narrow so if you are really interested in receiving these images you need to purchase a dedicated satellite receiver like the apt-6 satellite receiver
A very good program for decoding the signal from the various apt satellites is wxtoimg which i think has now become freeware
check the following site https://wxtoimgrestored.xyz
Below is a table of NOAA APT satellites with their frequencies that are still active
NOAA - 15 |
APT |
137.620 MHz |
OK |
NOAA - 18 |
APT |
137.9125 MHz |
OK |
NOAA - 19 |
APT |
137.100 MHZ |
OK |
APT SATELLITE FREQUENCIES
137.300 MHz |
137.400 MHz |
137.500 MHz |
137.620 MHz |
137.800 MHz |
137.850 MHz |
Below is a image taken from noaa 19 the second image is from noaa 18 showing bands of rain
You will want to know where the apt satellites are ( thou wxtoimg will automatically start recording when the satellite is within range ) so check the below links to the software to enable you to do this. below is a screen shot of wxtrack
RASPBERRY PI RE-VISTED
You will need to know where the satellites are ( or the international space station ) GPREDICT runs well on a raspberry as well as on windows
you can download gpredict for the raspberry pi from here
visit this page to see how to compile it
Now some bad news whereas the excellent wxtoimg program can be compiled on a raspberry pi, it cannot decode a 'live' transmission as you are relying on using a soundcard dongle to get an audio input into the raspberry pi - wxtoimg wants to use a sample rate of 11.025 kHz ( 11khz ) whereas the soundcard dongle only works at 44 kHz. The images simply will not sync (see the raspberry pi page )
The GPREDICT program works extremely well on a raspberry pi