Barnes R A, Eplee R E, Biggar S F, Thome K J, Zalewski E F, Slater P N, Holmes A W
General Sciences Corporation, Beltsville, Maryland 20705, USA.
Appl Opt. 2000 Oct 20;39(30):5620-31. doi: 10.1364/ao.39.005620.
We present the results of an experiment designed to measure the changes in the radiometric calibration of the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) from the time of its manufacture to the time of the start of on-orbit operations. The experiment uses measurements of the Sun at the manufacturer's facility to predict the instrument outputs during solar measurements immediately after launch. Because an onboard diffuser plate is required for these measurements, the experiment measures changes in the instrument-diffuser system. There is no mechanism in this experiment to separate changes in the diffuser from changes in the instrument. For the eight SeaWiFS bands, the initial instrument outputs on orbit averaged 0.8% higher than predicted with a standard deviation of 0.9%. The greatest difference was 2.1% (actual output higher than predicted) for band 3. The estimated uncertainty for the experiment is 3%. Thus the transfer-to-orbit experiment shows no changes in the radiometric sensitivities of the SeaWiFS bands--at the 3% level--from the completion of the instrument's manufacture to its insertion into orbit.
我们展示了一项实验的结果，该实验旨在测量海景宽视场传感器（SeaWiFS）从制造之时到在轨运行开始之时辐射定标的变化。该实验利用在制造商工厂对太阳的测量来预测发射后立即进行太阳测量期间仪器的输出。由于这些测量需要一块机载漫射板，因此该实验测量仪器 - 漫射板系统的变化。在这个实验中没有机制将漫射板的变化与仪器的变化区分开来。对于SeaWiFS的八个波段，在轨初始仪器输出平均比预测值高0.8%，标准差为0.9%。最大差异出现在3波段，为2.1%（实际输出高于预测值）。该实验的估计不确定度为3%。因此，从仪器制造完成到其进入轨道，在轨转移实验表明在3%的水平上，SeaWiFS各波段的辐射灵敏度没有变化。
