摘要
过去30a星载微波辐射计(SMMR和SSM/I)长时间序列的被动微波亮度温度数据,在陆地表层系统科学以及气候变化研究中起到了非常重要的作用。由于卫星及其携带的微波辐射计的更新,不同传感器所测得的同一地物在同一时间的亮温存在不同程度的偏差,通过分析相邻传感器重复观测时期同一地表18/19GHz和37GHz水平和垂直极化的亮度温度,并以DMSP的F13卫星上的SSM/I传感器为标准,建立了4个通道的交叉定标系数。
The long time series of passive microwave satellite data（SMMR and SSM/I）have provided important information on the earth surface science and climate research in the past decades.Due to update of satellite-based radiometers and their platforms,there are biases among brightness temperature from different sensors,at the same place.In order to obtain consistent brightness temperature datasets,the relationship of the microwave brightness temperatures from similar sensors on successive satellite platforms must be understood.The brightness temperature data at 18 and 37GHz channels of Nimbus-7 and 19GHz,37GHz channels of DMSP were analyzed.The cross cabibration coefficiemts are estimated based on F13.
出处
《遥感技术与应用》
CSCD
北大核心
2009年第5期617-621,共5页
Remote Sensing Technology and Application
基金
国家重点基础研究发展计划(2007CB411506)
国家自然科学基金项目(40601065)
冰冻圈科学国家重点实验室开放基金项目(SKLCS08-01)资助
关键词
亮度温度
被动微波
交叉定标
SMMR
SSM/I
Brightness temperature
Passive microwave
Cross-platform calibration
SMMR
SSM/I
