The study of in-orbit calibration accuracy of NOAA satellite infrared sounder and its effect on temperature profile retrievals |
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| Authors: | Chaohua Dong Quanhua Liu Guangqing Li Fengying Zhang |
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| Institution: | Satellite Meteorological Center, State Meteorological Administration, Beijing 100081,Satellite Meteorological Center, State Meteorological Administration, Beijing 100081,Satellite Meteorological Center, State Meteorological Administration, Beijing 100081,Satellite Meteorological Center, State Meteorological Administration, Beijing 100081 |
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| Abstract: | The calibration accuracy of High Resolution Infrared Radiation Sounder Mod. 2 (H1RS / 2) on NOAA-10 sat-ellite is analyzed in this paper. The non-linear effect in the linear calibration curve induces a deviation of 1.5 degrees (k) of brightness temperature in the tenth channel (8.3 urn, water vapor absorption) of the HIRS / 2 and the non-linear effect affects the other channels to a different extent. Based on analyzing non-linearity in two-point calibration curve, a tri-point calibration equation is given. A numerical test of effects of the linear and non-linear calibration models on the accuracy of atmospheric temperature retrievals is carried out. |
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