APT: Automatic Picture Transmission

Low resolution analog format from polar orbiting weather satellites.

Can be acquired with VHF omni-directional antenna.

137 MHz, RHCP. FM modulated carrier, AM modulated 2.4 kHz subcarrier.

NOAA/TIROS APT: 120 lpm, 2 channels(CHA/CHB) per line.

SOVIET METEOR APT: 120 lpm, 1 channel per line.

greyscale image of ANDREW NOAA11 VIS 8/26/92 (151K)

Sample NOAA 11 APT image in original IFOV(Instrument Field of View), with geopoliticals overlaid by WeatherTrac Analysis software.
Registration is automatic, based on accurate Keplarian elements and TOA(Time of Acquisition).

Full 8-bit greyscale may not be visible on your browser.

 

Above reprojected as Mercator

Above reprojected as Polar Stereographic

Sample of NOAA APT reprojected onto Mercator(27 kB)

Sample of NOAA APT reprojected onto Polar Sterographic (28 kB)

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