Spacecraft Brief Description
The GEOS 1 (Geodetic Earth Orbiting Satellite) spacecraft was a
gravity-gradient-stabilized, solar-cell powered unit designed
exclusively for ... geodetic studies. It was the first successful active
spacecraft of the National Geodetic Satellite Program.
Instrumentation included (1) four optical beacons, (2) laser
reflectors, (3) a radio range transponder, (4) Doppler beacons, and
(5) a range and range rate transponder. These were designed to
operate simultaneously to fulfill the objectives of locating
observation points (geodetic control stations) in a three dimensional
earth center-of-mass coordinate system within 10 m of accuracy, of
defining the structure of the earth's irregular gravitational field
and refining the locations and magnitudes of the large gravity
anomalies, and of comparing results of the various systems onboard the
spacecraft to determine the most accurate and reliable system.
Acquisition and recording of data were the responsibility of the GSFC
Space Tracking and Data Acquisitions Network (STADAN). Ten major
observing networks were used.
Launch Date and Time : 1965-11-06 18:43:00
Epoch Date and Time : 1978-12-30
Orbit Type : Geocentric
Apogee(km) : 2275.
Perigee(km) : 1113.
Inclination : 59.4
Date of last update : 1992-04-21