When the decoding is done, we take the LRPT image processing software and turn those ugly pictures into pretty pictures. It takes the data and outputs ugly pictures. WXtoIMG takes this audio feed, decodes it, and outputs pretty pictures. SDR activates itself and tunes as requested. Orbiter tells SDR to turn on and tells it which satellite is overhead as well as the doppler corrected frequency. Orbitron happily does these calculations for us so we can automate the whole thing. APT Weather Satellite Reception with RTL-SDR, SDR#, WXtoImg, and Orbitron Orbitron will provide a center frequency to tune to and will keep track of the doppler offset needed to keep the satellite tuned in. LRPT is digital and has always been a little trickier, but with just a little extra effort, you can receive both with the same equipment. APT is an analog signal and is generally the easiest to get started with. These satellites tend to fall into 2 main categories. Many of these take specialized equipment to receive, and when received, are generally encrypted so the owner of the satellite can sell that data to news stations, weather channels, etc. There are many satellites orbiting overhead, some of which are weather satellites. Needless to say, I like all things radio.
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