Stumpf Richard P, Werdell P Jeremy
NOAA National Ocean Service, Silver Spring, Maryland 20910, USA.
Opt Express. 2010 Jan 18;18(2):401-12. doi: 10.1364/OE.18.000401.
The band-by-band vicarious calibration of on-orbit satellite ocean color instruments, such as SeaWiFS and MODIS, using ground-based measurements has significant residual uncertainties. This paper applies spectral shape and population statistics to tune the calibration of the blue bands against each other to allow examination of the interband calibration and potentially provide an analysis of calibration trends. This adjustment does not require simultaneous matches of ground and satellite observations. The method demonstrates the spectral stability of the SeaWiFS calibration and identifies a drift in the MODIS instrument onboard Aqua that falls within its current calibration uncertainties.
利用地基测量对在轨卫星海洋水色仪器（如SeaWiFS和MODIS）进行逐波段替代校准存在显著的残余不确定性。本文应用光谱形状和总体统计数据来相互调整蓝色波段的校准，以便检验波段间校准情况，并有可能对校准趋势进行分析。这种调整并不要求地面观测和卫星观测同时匹配。该方法证明了SeaWiFS校准的光谱稳定性，并识别出搭载在Aqua卫星上的MODIS仪器存在的漂移，该漂移在其当前校准不确定性范围内。
