CAJ | 학술논문

中国风云三号（FY-3）A星于2008年5月27日成功发射，其上装载的微波温度计（Microwave Temperature Sounder，MWTS）有4个通道，频率分别为50.3，53.596，54.94和57.29GHz，可提供地面至平流层下部的大气温度廓线信息。介绍了MWTS的仪器特征和定标方法，对FY-3A发射后MWTS的仪器性能相关参数的长序列特征进行了监测分析，这些参数主要包括灵敏度、冷空和内部暖黑体的计数值、仪器温度和通道增益。通过再分析资料和微波辐射传输模拟，比较了FY-3A卫星MWTS与NOAA-18卫星先进微波温度探测器（Advanced Microwave Sounder Unit-A, AMSU-A）的观测和模拟的亮温偏差。结果表明，MWTS所有通道的灵敏度值优于其指标；通道1和3的亮温偏差与AMSU-A接近；通道2和4的偏差比AMSU-A要大一些。
중국풍운삼호（FY-3）A성우2008년5월27일성공발사，기상장재적미파온도계（Microwave Temperature Sounder，MWTS）유4개통도，빈솔분별위50.3，53.596，54.94화57.29GHz，가제공지면지평류층하부적대기온도곽선신식。개소료MWTS적의기특정화정표방법，대FY-3A발사후MWTS적의기성능상관삼수적장서렬특정진행료감측분석，저사삼수주요포괄령민도、랭공화내부난흑체적계수치、의기온도화통도증익。통과재분석자료화미파복사전수모의，비교료FY-3A위성MWTS여NOAA-18위성선진미파온도탐측기（Advanced Microwave Sounder Unit-A, AMSU-A）적관측화모의적량온편차。결과표명，MWTS소유통도적령민도치우우기지표；통도1화3적량온편차여AMSU-A접근；통도2화4적편차비AMSU-A요대일사。
The Chinese FengYun-3 (FY-3)A satellite was successfully launched on May 27, 2008, with a Microwave Temperature Sounder (MWTS) onboard. MWTS has four channels with frequencies of 50.3, 53.596, 54.94, and 57.29 GHz, respectively. The MWTS measurements are primarily used for profiling atmospheric temperatures from surface to lower stratosphere. MWTS is a cross-track scanning instrument, and its Earth-view measurements are calibrated through the warm target and cold space measurements during every scan cycle. In this paper, the FY-3A MWTS and its channel characteristics are first introduced. The calibration process and the postlaunch instrument performance are then presented, including the long-term trends of noise equivalent differential temperature (NEDT), calibration counts from cold space and warm targets, instrument telemetry, and channel gains. The observed and simulated brightness temperature (BT) differences of MWTS and Advanced Microwave Sounding Unit-A (AMSU-A) are compared. It is shown that the MWTS NEDT values at all channels are much better than its speciifcation. The BT biases of MWTS channels 1 and 3 with respect to the simulations are similar in magnitude to those from National Oceanic and Atmospheric Administration-18 AMSU-A. The MWTS biases at channels 2 and 4 are larger than AMSU-A.