Descrizione : 2 covers, Kennedy Space Center post stamps and Greenbelt Tracking.
GOES 4 was the sixth in a series of NASA-developed, NOAA-operated, geosynchronous and operational spacecraft. The spin-stabilized spacecraft carried
- (1) a VISSR (visible infrared spin scan radiometer) atmospheric sounder (VAS) to provide high-quality day/night cloudcover data, to take radiance-derived temperatures of the earth/atmosphere system, and to determine atmospheric temperature and water vapor content at various levels
- (2) a meteorological data collection and transmission system to relay processed data from central weather facilities to APT-equipped regional stations and to collect and retransmit data from remotely located earth-based platforms, and
- (3) a space environment monitor (SEM) system to measure proton, electron, and solar X-ray fluxes and magnetic fields.

When GOES 5 VAS experienced a failure on July 30, 1984, GOES 4 was reactivated by NOAA to provide GOES 1 VISSR data relay services to western users.

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GOES 4 (GOES D) (SATELLITE) · DELTA 3914