Lee, S., Y. Hong, C. Song, M. Lee, S. Ryoo, J. Kim, S. Yong, P. K. Bhartia, R. Park, J. Woo, Y. J. Kim, C. H. Song, J. H. Kim, K. Lee, C. Ho, S. K. Park, Y. Lee, J. Lee, M. Kim, Y. Eom, and J. Hong, Geostationary environment monitoring spectrometer(GEMS) onboard MP-GEOSAT(multi purpose geostationary satellite) over Asia-Pacific region, AGU Fall meeting, San Francisco, USA, December, 2009.