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March.15, 1978
MAGSAT
(Magnetic Field Satellite) -
EXPECTED LAUNCH DATE: September 1979
Expected Lifetime: 4-8 months
ORBIT: Quasi sun-synchronous
Inclination: 97%
Apogee: . 550 km -
Perigee: 325 .km
SENSORS: Alkali vapor scalar magnetometer, 15,000 to 64,000 gamma
Triaxial fluxgate magnetometer + 64,000 gamma
System accuracy:
Scalar + 3 gamma
Vector 6 gamma root sum squared (rss)
Telemetry downlink: -
2282.5 - 2284.5 megahertz pulse code modulation (PCM)
8 bit words
312 K bit data rate
OTHER FEATURES: Deployable boom
Boom attitude transfer system with redundant
self-calibrating 3-axis measurement to 5 arc sec
Magnetic spacecraft cleanliness at sensor: less
than 1 gamma
Weight: 165 kg Power: 72 watts
PURPOSE: Scalar and vector magnetic field measurements will be
: used to: s Ë
Update maps of Zarth's magnetic field
Produce geomagnetic field models
Produce crustal anomaly maps
REFERENCE: Langel, R.A., Regan, R.D., and Murphy, J.P.,
Magsat: A Satellite for Measuring Near-Earth Magnetic
Fields: NASA, Goddard Space Flight Center, Preprint
X-922-77-199.
CONTACT: Magsat Project
NASA/GSFC, Code 922
Greenbelt, MD 20771
Dr. Robert A. Langel, Project Scientist
Mr. Gilbert Ousley, Project Manager
DATA AVAILABILITY: National Space Sciences Data Center
NASA/GSFC
Greenbelt, MD 20771
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