Orbit and attitude determination for Bhaskara

Details Orbit and attitude determination for Bhaskara Orbit and attitude determination for Bhaskara

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981esasp.160..325b&link_type=abstract

In ESA Spacecraft Flight Dyn. p 325-332 (SEE N82-14123 05-12)

Physics

Indian Space Program, Orbit Calculation, Remote Sensing, Satellite Orientation, Guidance Sensors, Interferometry, Kalman Filters, Orbit Decay, Orbital Position Estimation, Polystation Doppler Tracking System

Scientific paper

An analytical orbit determination program is evaluated. During the early phase of the mission, satellite position was determined to an accuracy of 500 m, using interferometry data. An empirical method which uses times of closest approach data from a one way Doppler system reduces along track error to within 10 km is examined. Orbit decay is higher than predicted. The extended Kalman filter is used for attitude calculation data analysis, achieving 0.5 deg accuracy. It is concluded that a program which employs direct search, using simplexes, is more stable than an ordinary least square when data are limited.

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