The Evolution of GEOS-C and the Radar Altimeter for Geodetic Measurements.

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Abstract:

The geodetic series of satellites is traced from ANNA through GEOS-I and -II in terms of the geodetic experiments completed and proposed. The ANNA instruments included the use of four coherent frequencies for doppler tracking, a range transponder SECOR, and flashing lights for optical beacons. GEOS-I had the ANNA instruments plus a range and range-rate transponder and laser corner reflectors. GEOS-II had all the GEOS-I instruments plus C-band radar transponders and a C-band passive tracking array. GEOS-C will have the GEOS-II experiments minus the SECOR and plus a unified S-band transponder, a satellite-to-satellite tracking experiment, and an X-band radar altimeter for measuring sea level at the subsatellite position. It is expected that the satellite-to-sea-level distance will be measured to an accuracy of 1 to 5 meters in this experiment. Author

Author(s):
Kowal, S. J.
Author Organization(s):
JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB
Descriptive Note:
Technical memo.,
Pagination:
0030

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
APL-TG-1115, GIDEP-347.00.00.00-S6-49
Contract/Grant Number(s):
N00017-62-C-0604
Monitor Series:
347.00.00.00-S6-49
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation
Modernization Areas:
Space
Communities of Interest:
Space
Descriptor(s):
(*SCIENTIFIC SATELLITES, GEODESICS), (*RADIO ALTIMETERS, SCIENTIFIC SATELLITES), SYSTEMS ENGINEERING, SATELLITE TRACKING SYSTEMS, X BAND
Field(s)/Group(s):
Geodesy, Unmanned Spacecraft
Keyword(s):
ANNA, *GEODETIC SATELLITES, GEOS 1 SATELLITE, GEOS(GEODETIC EARTH ORBITING SATELLITES), GEOS C SATELLITE, GEOS 2 SATELLITE
Report Date:
1970 May 01