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Earth Radiation Budget Satellite, also called SAGE 2


Designation 15354 / 84108B
Launch date 5 Oct 1984
Country of origin United States
Mission Scientific: high atmosphere study
Perigee/Apogee 582/593 km
Inclination 57°
Period 96.4 min
Launch vehicle STS 17
Mass at launch 147 kg

Part of a NASA Earth Radiation Budget Experiment (ERBE) to measure radiation emitted by the Earth and the effect of a solar radiation incident on the Earth.

In Jul 2002, plans are to lower its orbit to organise a controlled reentry.

External resources


sat-index articles

Technical data


Prime contractor Ball
Mass at launch 2300 kg
Length 1.6 m
Height 3.8 m
Solar array 7 m span
Stabilization 3-axis

A 180 degree yaw maneuver is performed approximately every 5 weeks to keep sun on the solar arrays.

Payload: 2 radiometers and SAGE 2 (Stratospheric Aerosol and Gas Experiment) to monitor vertical distribution of aerosols, ozone and carbone dioxide in the stratosphere.

Telemetry and data via TDRS (S-band).

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