A satellite cross-calibration experiment
A satellite cross-calibration experiment
复制标题
卫星交叉标定实验
DOI：
10.1109/lgrs.2004.831202
复制
发表时间：
2004
影响因子：
4.8
通讯作者：
M. Hori
中科院分区：
文献类型：
--
作者：
J. Nieke;T. Aoki;T. Tanikawa;H. Motoyoshi;M. Hori
最近，高级地球观测卫星2号（ADEOS-2）成功发射（2002年12月14日），ADEOS-2卫星上的全球成像仪（GLI）于2003年4月开始运行。在第一次校准检查中，相对于具有不同校准背景的不同卫星上的其他传感器，GLI的辐射性能进行了比较。作为校准地点，使用了阿拉斯加州巴罗附近的一个大雪原，在那里，极地轨道上的空间传感器在同一天观察同一个地面目标，在当地穿越时间上有很小的差异。这就是为什么选择GLI、中等分辨率成像光谱仪（Terra，Aqua）、海景宽视场传感器、高级甚高分辨率辐射计（N16，N17）、中等分辨率成像光谱仪和高级沿着轨迹扫描辐射计数据集用于以下晴空条件日：2003年4月14日和26日。与此同时，地面实况实验（例如，测量地面反射率、双向反射分布函数、气溶胶光学厚度）。然后，利用辐射传输程序对每个传感器、每个波段、每天的大气层顶（TOA）辐射率/反射率进行了正演计算。最后，将间接检索的TOA信号与TOA传感器1B级数据进行比较。因此，在执行使命期间，全球激光倡议的表现令人鼓舞。GLI和其他七个传感器在预期的间接计算的TOA信号周围的约5%至7%的范围内提供类似的传感器输出。
Recently, the Advanced Earth Observing Satellite 2 (ADEOS-2) was launched (December 14, 2002) successfully, and the Global Imager (GLI) onboard the ADEOS-2 satellite became operational in April 2003. In a first calibration checkup, the radiometric performance of GLI was compared relatively to that of other sensors on different satellites with different calibration backgrounds. As a calibration site, a large snowfield near Barrow, Alaska, was used, where space sensors in polar orbits view the same ground target on the same day with small differences in the local crossing times. This is why GLI, the Moderate Resolution Imaging Spectroradiometer (Terra, Aqua), the Sea-viewing Wide Field-of-view Sensor, the Advanced Very High Resolution Radiometer (N16, N17), the Medium Resolution Imaging Spectrometer, and the Advanced Along Track Scanning Radiometer datasets were selected for the following clear-sky condition days: April 14 and 26, 2003. At the same time, ground-truth experiments (e.g., measurements of ground reflectance, bidirectional reflectance distribution function, aerosol optical thickness) were carried out. Thereinafter, top-of-atmosphere (TOA) radiance/reflectance was forward calculated by means of radiative transfer code for each sensor, each band, and each day. Finally, the vicariously retrieved TOA signal was compared to TOA sensor Level 1B data. As a result, GLI's performance is encouraging at that time of the mission. GLI and the other seven sensors deliver similar sensor output in the range of about 5% to 7% around the expected vicariously calculated TOA signal.