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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.1
- 수록면
- 353 - 360 (8page)
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초록· 키워드
오류제보하기
Earth’s gravity field recovery was improved after the pre-processing upgrade of the Gravity Recovery And Climate Experiments (GRACE) satellite’s star trackers. The star tracker measurements were filtered with a tighter low-pass filtering of 0.025Hz cutoff frequency, instead of a nominal filtering of 0.1Hz cutoff frequency. In addition, a jump removal algorithm was applied to remove discontinuities, due to direct Sun and/or Moon interventions, in the star tracker measurements. During the K-Band Ranging (KBR) calibration maneuvers, large attitude variations could be detected concurrently by both of the star trackers and the accelerometer. The misalignment angles of star trackers between the true frame and the normal frame could be determined by comparing measurements from these sensors. In this paper, new Earth’ gravity field maps were obtained using above improvement. Based on comparisons to nominal Earth’s gravity field maps, the new Earth’s gravity field maps were found better than the nominal ones. Among the applied methods, the misalignment calibration of the star trackers had a major impact on the improvement of the new Earth’s gravity field maps.
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참고문헌 (11)
참고문헌 신청
Bandikova, T. / 2014 / Improvement of the GRACE star tracker data based on the revision of the combination method / Advances in Space Research 54 (9) : 1818 ~ 1827
GRACE Team / 1998 / GRACE Science and Mission Requirements Document (SMRD) / GRACE 327-200, JPL D-15928
Kim / 2000 / Simulation Study of a Low-Low Satelliteto-Satellite Tracking Mission / Ph.D. / the University of Texas at Austin
Ko, U. / 2012 / High-Frequency Noise in the Gravity Recovery and Climate Experiment Intersatellite Ranging System / Journal of Spacecraft and Rockets 49 (6) : 1163 ~ 1173
MacArthur, J.L / 1985 / Satellite-to-Satellite Range-Rate Measurement / IEEE Transactions on Geoscience and Remote Sensing GE-23 (4) : 517 ~ 523
GRACE Team / 1998 / GRACE Science and Mission Requirements Document (SMRD) / GRACE 327-200, JPL D-15928
Kim / 2000 / Simulation Study of a Low-Low Satelliteto-Satellite Tracking Mission / Ph.D. / the University of Texas at Austin
Ko, U. / 2012 / High-Frequency Noise in the Gravity Recovery and Climate Experiment Intersatellite Ranging System / Journal of Spacecraft and Rockets 49 (6) : 1163 ~ 1173
MacArthur, J.L / 1985 / Satellite-to-Satellite Range-Rate Measurement / IEEE Transactions on Geoscience and Remote Sensing GE-23 (4) : 517 ~ 523
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