ERBS

 1984-108B

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The Earth Radiation Budget Satellite (ERBS) was originally planned as the fourth Applications Explorer Mission (AEM-D). ERBS was carried into space aboard the Space Shuttle Challenger on mission 41-G. Launch was at 1103 on 1984 Oct 5. It was deployed by the RMS arm at 2218 on Oct 5 into a 353 x 355 km x 57 deg orbit. A hydrazine internal propulsion system was used to raise the orbit. Its final orbit was 601 x 605 km x 57 deg.

ERBS
Date	Time	Event	Orbit
1984 Oct 5	1103	Launch by Shuttle
1984 Oct 5	2218	RMS deploy	353 x 355 x 57
1984 Oct 7		3hr AOCS burn for orbit raise	408 x 420 x 57.0
1984 Oct 8		6h7m AOCS burn
1984 Oct 9		4h48m AOCS burn
		Orbit trim	592 x 603 x 57.0
1984 Oct 10		Operational orbit	603 x 604 x 57.0
1984 Oct 23		Operational
1984 Nov 6		ERBE contamination doors open
1985 Jan 10			596 x 610 x 57.0
1989		Begin orbital decay
1992		Orbit maintenance resumes
1998		Orbit maintenance ends, resume decay
2002 Jul 21			562 x 568 x 57.0
2002 Jul		Perigee lower burns
2002 Aug 3			547 x 566 x 57.0
2002 Aug 25			507 x 558 x 57.0
2005 Sep 8		Demo burn
2005 Sep 13		Confidence burn
2005 Sep 16		Depletion burn 1
2005 Sep 16			496 x 551 x 57.0
2005 Sep 26		Depletion burn 2?, tumbled
2005 Oct 6			500 x 547 x 57.0
2005 Oct 12		Depletion burns
2005 Oct 14		Depletion burns
2005 Oct 15		end of ops
2005 Oct 18			507 x 539 x 57.0

Payload:

• ERBE-S ERBE-Scanner, five channel cavity radiometer (two nadir wide FOV 0.2-50 mu, 0.2-5 mu, two nadir medium FOV 0.2-50,0.2-5mu, one solar viewing).

• ERBE-NS ERBE Non Scanner (Earth Radiation Budget Satellite) Radiators to measure amount of solar energy received and reradiated by different parts of Earth. Operates with NOAA-F,G; three channel bolometers, 0.2-5, 5-50, 0.2-50 mu.

• SAGE-II Stratospheric Aerosol and Gas Expt II, 7-channel radiometer