High-resolution picture transmission

<p><a href="/facts/Weather_satellite/yl7QCK8n">Weather satellite</a> 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 <a href="/facts/EUMETSAT/EsoSREJp">EUMETSAT</a> weather satellite transmissions. HRPT transmissions are available around the world and are available from both polar and geostationary weather satellites. The polar satellites rotate in orbits that allow each location on Earth to be covered by the weather satellite twice per day while the <a href="/facts/Geostationary_satellites/xWRv8lAL">geostationary satellites</a> remain in one location at the equator taking weather images of the Earth from that location over the equator. The sensor on weather satellites that picks up the data transmitted in HRPT is referred to as an <a href="/facts/Advanced_Very_High_Resolution_Radiometer/uWI0BGEh">Advanced Very High Resolution Radiometer</a> (AVHRR) for NOAA satellites. 
</p><p>Broadcast signal
The working frequency band for HRPT is <a href="/facts/L_band/6l9P26IP">L Band</a> at 1.670–1.710 GHz and the modulation 
type is<a href="/facts/BPSK/TFnpYe64">BPSK</a>. On <a href="/facts/NOAA/IvcuqNJg">NOAA</a> KLM satellites the transmission power is 6.35 Watts, or 38.03 dBm. The <a href="/facts/MetOp-A/XnNqvSSu">METOP-A</a> satellite broadcasts with a bandwidth of 4.5 MHz, these use QPSK and AHRPT.
</p>

High-resolution picture transmission open-in-new

High-resolution picture transmission