Estimation of stray light contamination for current and next generation geostationary ocean color instruments in orbital measurement

Yukyeong Jeong, Soomin Jeong, Dongok Ryu, Seonghui Kim, Seongick Cho, Jinsuk Hong, Heong Sik Youn, Sun Hee Woo, Sug Whan Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report stray light simulation for the current GOCI and proposed next generation ocean color instruments GOCI-II. GOCI is a TMA system of 140mm in aperture and GOCI-II is a Cassegran telescope based system of about 300mm in aperture. Both instruments are designed to provide 500 m and 200 m in spatial resolution respectively. During in-orbit measurement operation, these instruments are exposed to sun light illuminating the Earth surface. The instrument aperture is then filled with the incident stray light originated from around the measurement target. We built complete 3D optical models of GOCI and GOCI-II with realistic optical characteristics. A full 3D optical Earth model was also built using the world coastal line data of 15km in spatial resolution. The Sun was modeled in real scale for both geometric size and radiative power. These components were integrated into a Monte Carlo ray tracing computation for source-to-detector radiative transfer. The stray light levels were then estimated for possible orbital configurations for in-orbit measurement operation. The study presents analysis model building, details of stray light computation and results.

Original languageEnglish
Title of host publication60th International Astronautical Congress 2009, IAC 2009
Pages2597-2605
Number of pages9
Publication statusPublished - 2009
Event60th International Astronautical Congress 2009, IAC 2009 - Daejeon, Korea, Republic of
Duration: 2009 Oct 122009 Oct 16

Publication series

Name60th International Astronautical Congress 2009, IAC 2009
Volume4

Other

Other60th International Astronautical Congress 2009, IAC 2009
CountryKorea, Republic of
CityDaejeon
Period09/10/1209/10/16

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Astronomy and Astrophysics

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    Jeong, Y., Jeong, S., Ryu, D., Kim, S., Cho, S., Hong, J., Youn, H. S., Woo, S. H., & Kim, S. W. (2009). Estimation of stray light contamination for current and next generation geostationary ocean color instruments in orbital measurement. In 60th International Astronautical Congress 2009, IAC 2009 (pp. 2597-2605). (60th International Astronautical Congress 2009, IAC 2009; Vol. 4).