Pagrindinis puslapis
Polar Orbita:



Operator: National Oceanic and Atmospheric Administration (NOAA)

Launch date: 05/1998 (NOAA 15), 09/2000 (NOAA 16), 06/2002 (NOAA 17), 05/2005 (NOAA 18)

Type of orbit: sun-synchronous, i.e. the satellite crosses a certain point always at the same time of the day.

Aukštis: 850 km

Inclination of the orbit: 98 degrees compared to the equatorial plan.

Period of revolution: 102 minutes, 14 orbits are achieved per day on ascending and descending passes. The period of revolution is the time taken for the satellite to complete a full rotation of the Earth. The 2 satellites are out of phase; a same area is flown over at least 4 times per day with an interval of approximately 6 hours.

Instrument: AVHRR

AVHRR (Advanced Very High Resolution Radiometer) is a radiometer which enables a very high resolution.

This instrument scans a roughly 3000 km wide swath. (1,1 km to the vertical of the satellite).

kanalas Wavelength (µm) Typical use
1 0.58 - 0.68 Daytime cloud and surface mapping
2 0.725 - 1.00 Land-water boundaries
3A 1.58 - 1.64 Snow and ice detection
3B 3.55 - 3.93 Night cloud mapping, sea surface temperature
4 10.30 - 11.30 Night cloud mapping, sea surface temperature
5 11.50 - 12.50 Sea surface temperature
Polar Orbita: