1. 제 목 : Orbit ephemerides and coordinate transformations widely used in GPS applications

2. 연  사 : Jung Hyun Jo, PhD
               (Principal Researcher
                Space Situational Awareness Center
                Korea Astronomy and Space Science Institute)

3. 일  시 : 2013년 2월 15일 (금) 16:00-17:50

4. 장  소 : 서울대학교 301동 117호 세미나실

5.내 용 : Some of GPS applications nowadays require even Positional Astronomical accuracy and precision. This situation leads peoples to revisit the contents of GPS navigation message, position determination algorithm in a receiver, the quality of orbital elements(i.e. almanac, ephemerides), derivatives of orbital elements, ECEF to ECI coordinates transformation, and so on. The speaker will talk about following issues.

   1. Procedures of positioning algorithm for GPS satellite using GPS Ephemeris
   2. Fundamental difference between GPS ephemeris and classical orbit elements
      (comparing GPS and GPS III)
   3. Orbit element correction terms in GPS ephemeris and its application
   4. Coordinate transformation between the orbital plane in GPS ephemeris to ECEF(WGS-84)
   5. Characteristics of ECI coordinate for GPS ephemeris, J2000 (or GCRF) ECI coordinate

6. 연사약력
  2011.05- : Principal Researcher, Korea Astronomy and Space Science Institute
  2002.08 - 2005.08: Research Engineer II, Auburn University
  2002.08: Ph.D. Aerospace Engineering, Auburn University
  1988.02: M.S. Astronomy and Atmospheric Science, Yonsei University Graduate School
  1986.02: B.S. Astronomy and Atmospheric Science, Yonsei University
   
7. 문  의 : 기계항공공학부 기창돈 교수 (☏ 880-1912)