Abstract
The first Korean meteorological geostationary satellite, Communication, Ocean, and Meteorological Satellite (COMS) was launched on June 27th, 2010. And we have tuned radiometric parameters such as visible and infrared slope trend, scan mirror emissivity coefficients, midnight effect correction and so on during the In-Orbit Test (IOT). National Meteorological Satellite Center (NMSC) of Korea Meteorological Administration (KMA) has begun official service of COMS Meteorological Imager (MI) data since April 1st, 2011. We have investigated radiometric performances and trend of parameters for first one year since official service begin. The Pixel-to-pixel Response Non-Uniformity (PRNU) which is derived from Signal to Noise Ratio (SNR) at 5% Albedo is below the requirement, i.e. 0.8 w/(m2 sr μm) for visible channel. In case of infrared channels, the PRNU which is derived from Noise Equivalent delta Temperature (NEdT) is better than the specification at both 220K and 300K. All the radiometric performances of visible and infrared channels are within the specification. In this paper, we will present the radiometric performances and data quality indices for visible and infrared channels of COMS MI and also present distribution success rate for COMS MI data.
Radiometric Performances of COMS MI for First One Year
The first Korean meteorological geostationary satellite, Communication, Ocean, and Meteorological Satellite (COMS) was launched on June 27th, 2010. And we have tuned radiometric parameters such as visible and infrared slope trend, scan mirror emissivity coefficients, midnight effect correction and so on during the In-Orbit Test (IOT). National Meteorological Satellite Center (NMSC) of Korea Meteorological Administration (KMA) has begun official service of COMS Meteorological Imager (MI) data since April 1st, 2011. We have investigated radiometric performances and trend of parameters for first one year since official service begin. The Pixel-to-pixel Response Non-Uniformity (PRNU) which is derived from Signal to Noise Ratio (SNR) at 5% Albedo is below the requirement, i.e. 0.8 w/(m2 sr μm) for visible channel. In case of infrared channels, the PRNU which is derived from Noise Equivalent delta Temperature (NEdT) is better than the specification at both 220K and 300K. All the radiometric performances of visible and infrared channels are within the specification. In this paper, we will present the radiometric performances and data quality indices for visible and infrared channels of COMS MI and also present distribution success rate for COMS MI data.