UARS

Upper Atmospheric Research Satellite

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General

Designation	21701 / 91063B
Launch date	12 Sep 1991
Country of origin	United States
Mission	Scientific: high atmosphere study
Perigee/Apogee	555/586 km
Inclination	56.9°
Period	96 min
Launch vehicle	STS 48

Mission: systematic study of Earth's stratosphere, mesosphere and lower thermosphere with specialized payloads. Cost: $630 million. It should be followed up by EOS Chemistry 1 in 2003.

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End of life

Out of service	late 2005
Decay	24 Sep 2011 (in south Pacific)

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External resources

http://umpgal.gsfc.nasa.gov/uars-science.html

sat-index articles

Technical data

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Specifications

Prime contractor	GE Astro
Platform	MultiMission Spacecraft bus
Mass at launch	6800 kg (2500 kg for the payload)
Diameter	5 m
Height	10 m
Solar array	1.5 x 3.3 m
Stabilization	3 axis
Design lifetime	3 years

Telemetry: 2287.5 MHz (realtime: 32/1 kbps, playback: 512 kbps)
Command: 2106.4 MHz (1/0.12 kbps)

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CLAES (Cryogenic Limb Array Etalon Spectrometer)

Vertical profiles of minor species (between 10-60 km)

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HALOE (Halogen Occultation Experiment)

Vertical distribution of minor species in stratosphere

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ISAMS (Improved Stratospheric and Mesospheric Sounder)

Temperature and ozone concentrations in stratosphere and mesosphere

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MLS (Microwave Limb Sounder)

ozone and other trace gases in stratosphere and mesosphere

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HRDI (High Resolution Doppler Imager)

Horizontal windspeeds and temperature in upper troposhere and thermosphere

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WINDII (Wind Imaging Interferometer)

Windspeed and temperature in mesosphere and lower thermosphere

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PEM (Particule Environment Monitor)

Global input of charged particle energy

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SOLSTICE (Solar Stellar Irradiance Comparison Experiment)

Full disk solar UV irradiance

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SUSIM (Solar UV Spectral Irradiance Monitor)

solar irradiance, solar flux variability

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ACRIM 2 (Active Cavity Radiometer Irradiance Monitor)

wide band total solar irradiance

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