In an earlier posting, I presented a recording that I did of the new Russian satellite Yubileiny, also designated RS-30. I finally found my spectrogram code, and made a picture of the resulting recording. It's kind of big, but click the thumbnail below if you want to have a peek:
The image consists of 27 spans, each of about 30 seconds. You can see that every five seconds, my program corrects for the doppler shift, perhaps causing a break in the morse line. It's relatively easy to read the morse code off the resulting image.
Platypus is a system that can convert scripts (shell, Python or even perl) into something that looks a lot more like a real Mac application. I have a number of potential uses for it to pretty up some of my scripts, so I'm bookmarking this for now.