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tags/v1.2
Thierry Leconte 21 年之前
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ATPDEC README (Thierry Leconte 2003)

DESCRIPTION
Atpdec is a open source program that decode images transmitted by POES
NOAA weather satellite serie.
These satellites transmit continuously, among other things, medium resolution images
of the earth on 137Mhz.
These transmitions could be easely received with
an inexpensive antenna and dedicated receiver.
Output from such a receiver, is an audio signal that could be recorded

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.

Atpdec will convert these sounfiles into .png images.

For each soundfile up to 4 images could be generated :
1) Raw image : contains the 2 transmitted channel images + telemetry and synchro pulses.
Raw image is not calibrated, so it could be too dark or too light depending of
the recording level.
2) Calibrated channel A image
3) Calibrated channel B image
4) False color image
1. Raw image : contains the 2 transmitted channel images + telemetry
and synchro pulses.
2. Calibrated channel A image
3. Calibrated channel B image
4. False color image

Input soundfiles must be mono signal sampled at 11025 Hz.
Atpdec use libsnd to read soundfile, so any sound file format supported by libsnd


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