Accession Number : AD0760791

Title :   Extensions to SAGA (Short Arc Geodetic Adjustment) for the Geodetic Reduction of Doppler Operations.

Descriptive Note : Final rept. Jul 71-Jan 73,

Corporate Author : DBA SYSTEMS INC MELBOURNE FLA

Personal Author(s) : Brown,Duane C. ; Trotter,Jerry E.

Report Date : JAN 1973

Pagination or Media Count : 71

Abstract : Several significant extensions to the AFCRL program SAGA (Short Arc Geodetic Adjustment) have been implemented and tested. These include: improved corrections for tropospheric refraction; capability of exercising on option the precise NWL ephemeris as defined by minute vectors; automatic detection and removal of cycle count errors; an option for processing Geoceiver observations as if they were Intermittently Integrated Doppler (IID) observations; an option to exercise base line constraints expressed in terms of geodesic azimuths and distances; an option to define the coordinate system of the tracking net by means of G. Blaha's 'Inner Adjustment Constraints'; an option to recover relative timing synchronization between stations independently of satellite timing signals; extension of the orbital integrator to accommodate an earth potential defined by spherical harmonics of arbitrarily high degree and order (n,m). By virtue of these extensions SAGA has become a more accurate and more versatile tool for satellite geodesy. (Author)

Descriptors :   (*SATELLITE TRACKING SYSTEMS, POSITION FINDING), GEODESICS, SCIENTIFIC SATELLITES, ORBITS, RANGE FINDING, TROPOSPHERE, REFRACTIVE INDEX, MATHEMATICAL MODELS, DOPPLER EFFECT

Subject Categories : Geodesy

Distribution Statement : APPROVED FOR PUBLIC RELEASE