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Detailed information about COBE satellite

Designator id: 1989-089A

Description of COBE Satellite:

The purpose of the Cosmic Background Explorer (COBE) mission was to take precise measurements of the diffuse radiation between 1 micrometer and 1 cm over the whole celestial sphere. The following quantities were measured: (1) the spectrum of the 3 K radiation over the range 100 micrometers to 1 cm; (2) the anisotropy of this radiation from 3 to 10 mm; and, (3) the spectrum and angular distribution of diffuse infrared background radiation at wavelengths from 1 to 300 micrometers.

The experiment module contained the instruments and a dewar filled with 650 liters of 1.6 K liquid helium, with a conical sun shade. The base module contained the attitude control, communications and power systems. The satellite rotated at 1 rpm about the axis of symmetry to control systematic errors in the anisotropy measurements and to allow observations of the zodiacal light at various solar elongation angles. The orientation of the spin axis was maintained anti-earth and at 94 degrees to the sun-earth line. The operational orbit was dawn-dusk sun-synchronous so that the sun was always to the side and thus was shielded from the instruments. With this orbit and spin-axis orientation, the instruments performed a complete scan of the celestial sphere every six months.

Instrument operations were terminated 1993-12-23. As of January 1994, engineering operations were to conclude that month, after which operation of the spacecraft would be transferred to Wallops for use as a test satellite.


Technical data:

Launch Date: 1989-11-18
Launch Vehicle: Delta
Launch Site: Vandenberg AFB, United States
Mass: 2206.0 kg
Nominal Power: 750.0 W
Funding Agencies:

NASA-Office of Space Science Applications (United States)

Disciplines:

Astronomy

Source: Nasa

Two Line Element Set (TLE):
1 20322U 89089A   12337.89999589 -.00000218  00000-0 -10885-3 0  9117
2 20322 099.0023 344.0786 0008308 197.9191 162.1676 14.04522736180699

Last TLE update on :2012-12-03

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