1. 제 목 : Jason-1 POD Using GPS Combined with Laser and DORIS Tracking Data

2. 연 사 : 최기록(Center for Space Research, University of Texas at Austin.)

3. 일 시 : 2007년 9월 21일(금요일) 오전 11시~

4. 장 소 : 서울대학교 301동 15층 세미나실(1512호)

5. 내 용 :
Jason-1 is a follow-on altimeter mission to the TOPEX/POSEIDON (T/P) mission. With the implementation of the Jason-1 satellite altimeter mission, the goal of reaching the 1-cm level in orbit accuracy was set. This requires significant improvement in current nowledge of surface force effects as well as improvement in knowledge of gravity field model. To support the Precision Orbit Determination (POD) requirements, the Jason-1 spacecraft carries receivers for DORIS (Doppler Orbitography and Radiopositioning integrated by Satellite) and GPS (Global Positioning System), as well as a retroreflector
for SLR (Satellite Laser Ranging). The overall orbit accuracy for Jason will depend on the quality and the relative weighting of the available tracking data.

In this seminar, the relative importance of the SLR, DORIS, and GPS tracking data will be
discussed along with the most effective parameterization for accounting for the unmodeled
accelerations through the application of empirical accelerations.
The optimal relative weighting for each type of tracking data will be examined. It is
demonstrated that GPS tracking alone is capable of supporting a radial orbit accuracy for
Jason-1 at the 1-cm level, and that including SLR tracking provides additional benefits.

6. 약 력 :
2004 - Present Research Associate, Center for Space Research, Univ. of Texas at Austin.
2003 Ph.D., Aerospace, University of Texas at Austin
1996 - 2003 Research Assistant, Center for Space Research, Univ. of Texas at Austin.
1991 - 1995 M.S. Program, Astronomy, SNU (Including Military Service)
1987 - 1991 B.S., Astronomy, Seoul National University

7. 문 의 : 기계항공공학부 기 창 돈 교수 (☏ 880-1912)