Acrimsat

Active Cavity Radiometer Irradiance Monitor

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General

Designation	26033 / 99070B
Launch date	21 Dec 1999
Country of origin	United States
Mission	Scientific: sun observation
Operator	NASA JPL
Perigee/Apogee	683/272 km, sun-synchronous
Inclination	98.3°
Period	99 min
Launch vehicle	Taurus #4

Uses the ACRIM instrument which has already flown twice on SMM and UARS. It was the first instrument to clearly demonstrate that the total radiant energy from the sun was not a constant.

The satellite has pointing accuracy problems.

Close miss with Sentinel 1A in April 2014.

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End of life

Out of service	Dec 2013
Cause	Power failure
Decay

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External resources

http://acrim.jpl.nasa.gov/

http://eospso.gsfc.nasa.gov/eos_observ/1_2_95/p39.html
sat-index articles

Technical data

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Specifications

Prime contractor	OSC
Platform
Mass at launch	115 kg
Mass in orbit
Dimension
Solar array
Stabilization
DC power
Design lifetime	5 years

Downlink: 2250 MHz

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