Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10694205 | Advances in Space Research | 2015 | 15 Pages |
Abstract
A new technique to improve the tracking performance of a ship-borne mobile telemetry antenna system in the marine environment is presented for Korea Space Launch Vehicle-I (KSLV-I) mission. The concept of 'pointing bias' is introduced to compensate for the instability or inaccuracy of a sensor in the ship-borne mobile telemetry antenna system. The LEO satellites in the form of 'tracking campaign' are used to measure the pointing bias. The proposed technique is verified through the tests in Jeju sea and Pacific sea in the period of November 23-28, 2012. The results demonstrated that the azimuth pointing bias about â0.27° and â0.49° appears in Jeju sea and Pacific sea, respectively and the pointing bias was proved to be mainly relevant to the heading measurement error of the gyrocompass. Taking into consideration of the pointing bias results in Jeju sea and Pacific sea, the gyrocompass was corrected by 0.25° to compensate for the heading measurement error on the ship-borne mobile telemetry antenna system. The correction value of 0.25° is selected to reduce the risk in tracking. Due to insufficient correction, the residual pointing bias about â0.12° in Pacific sea was observed and the successful tracking of KSLV-I is achieved on January 30, 2013.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
Sun Ik Lee, Kyung-Whan Yeom,