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- ATPDEC README (Thierry Leconte 2003)
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- DESCRIPTION
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- Atpdec is an open source program that decodes images transmitted by POES
- NOAA weather satellite series.
- These satellites transmit continuously, among other things, medium
- resolution images of the earth on 137Mhz.
- These transmissions could be easily received with an inexpensive antenna
- and dedicated receiver.
- Output from such a receiver, is an audio signal that could be recorded
- into a soundfile with any soundcard.
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- Atpdec will convert these sounfiles into .png images.
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- For each soundfile up to 6 images could be generated :
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- 1. Raw image : contains the 2 transmitted channel images + telemetry
- and synchro pulses.
- 2. Calibrated channel A image
- 3. Calibrated channel B image
- 4. Temperature compensed I.R image
- 5. False color image
- 6. pixel distribution statistique (usefull for false color cmap debugging).
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- Input soundfiles must be mono signal sampled at 11025 Hz.
- Atpdec use libsnd to read soundfile, so any sound file format supported by libsnd
- could be read.(Only tested with .wav file).
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- COMPILATION
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- Atpdec is written in plain standart C and must be very portable.
- It was only tested on Linux Suse 8.2, but must work on any Unix platform.
- Just adapt the Makefile and type make (sorry no configure).
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- atpdec use libsnd, libpng and libm.
- snd.h and png.h header must be present on your system.
- If they are not on standard path, edit the include path in the Makefile.
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- USAGE
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- see atpdec.1 man page.
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