High-resolution picture transmission

Live Weather satellite pictures are often broadcast as high-resolution picture transmissions (HRPTs), color high-resolution picture transmissions (CHRPTs) for Chinese weather satellite transmissions, or advanced high-resolution picture transmissions (AHRPTs) for EUMETSAT weather satellite transmissions. HRPT transmissions are generally available around the world and are currently transmitted from some polar orbiting weather satellites.

Broadcast signal
The working frequency band for HRPT is L Band at 1.670–1.710 GHz and the modulation type is BPSK. On NOAA KLM satellites the transmission power is 6.35 Watts, or 38.03 dBm. The METEOR-M series of satellites uses a similar format to HRPT with the same modulation. The METOP satellites broadcast with a bandwidth of 4.5 MHz, these use QPSK and AHRPT.

This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.