Some of you may remember that I wrote my own APT satellite decoder. I ran across someone else who did the same:

ATPDEC by Thierry Leconte (F4DWV)

It has the same basic philosophy as my own crude efforts: hand it a WAV file, and it will find and produce the APT imagery from inside it. I went outside and recorded some of the NOAA 19 pass over my location today, and came up with the following:

Pretty nifty! I did have some trouble with some of the older recordings though: I suspect that noise may toss off his calibration in some way which isn’t entirely obvious. I’ll have to play with it more.