Thruster Performance Estimatino of Koreasat F1 & F2

Details Thruster Performance Estimatino of Koreasat F1 & F2 Thruster Performance Estimatino of Koreasat F1 & F2

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jass...18..137p&link_type=abstract

Journal of Astronomy and Space Science, vol. 18, no. 2, p. 137-144

Computer Science

Performance

Thruster Performance, Koreasat, Orbit Deterimation

Scientific paper

This paper presents the REA thrusters performance estimation results for the KOREASAT F1&F2 launched in 1995. The satellite tracking data obtained from the ground system from end of 1999 to beginning of the 2000 are used to estimate the thruster performance. The estimation algorithm is derived from the least square estimation theory and designed to estimate the velocity change induced by the on-boarded thruster firing as well as the orbit parameter. The estimation results show that the Koreasat F1 thruster are in bad thruster condition of 64% performance for REA when it fires in on-pulse mode. Here, the performance is defined by the ratio of the resulted velocity change to that of planned. But, in the case of the Koreasat F2, it is found that the performance approximately reaches up to 100%, even after the 5 years of the mission.

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