NOAA APT Decoder
Decode analog, APT signals from the NOAA weather satellites.
Images are decoded from WAV files with a sample rate of 20800Hz. Files can be resampled using two methods.
Installation on Linux
sudo apt install git pip install pillow numpy scipy git clone https://github.com/zacstewart/apt-decoder cd apt-decoder
Method 1: Using a Python script with no additional dependencies.
cd apt-decoder python3 resample.py recording.wav resampled.wav
Method 2: Using SoX and a bash script. This method is faster and filters the signal to improve the quality of the image.
sudo apt install sox cd apt-decoder ./resample.sh recording.wav resampled.wav
cd apt-decoder python3 apt.py resampled.wav image_out.png
Images will probably look upside down if the satellite passed from south to north instead of north to south. In fact, the following examples are upside down.
You can also try wxtoimg but looks dead.