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首页> 外文会议>Conference on Sensors, Systems, and Next-Generation Satellites VI Sep 23-26, 2002 Agia Pelagia, Crete, Greece >The reflectance-based calibration of SeaWiFS
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The reflectance-based calibration of SeaWiFS

机译：SeaWiFS基于反射率的校准

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摘要

We present a calibration approach for the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) based on the reflectance properties of the instrument's onboard diffuser. This technique uses SeaWiFS as a reflectometer, measuring the reflected solar irradiance from the Earth and from the onboard diffuser. Since the sun is the common source of light for both measurements, the ratio of the SeaWiFS-measured radiances from the Earth and the diffuser provide the ratio for the reflectances of the two samples. The reflectance characterization of the onboard diffuser is the calibration reference for this approach. The result of the ratioing technique is based on the linearity of the instrument's response to the intensity of the input light. The calibration requires knowledge of the reflectance of the onboard diffuser at the start of the SeaWiFS mission, the response of the instrument bands, in digital numbers (DN), for measurements of the diffuser at that time, and the change of the instrument's response over time after the start of the mission.
机译：我们基于仪器的机载漫射器的反射率特性，提出了一种适用于海景宽视野传感器（SeaWiFS）的校准方法。这项技术使用SeaWiFS作为反射计，测量从地球和从机载扩散器反射的太阳辐照度。由于太阳是这两种测量的共同光源，因此，从SeaWiFS测量到的来自地球和散射体的辐射的比率提供了这两个样本的反射率的比率。车载漫射器的反射特性是该方法的校准参考。定量技术的结果是基于仪器对输入光强度的线性响应。校准需要了解SeaWiFS任务开始时车载扩散器的反射率，仪器带的响应（以数字（DN）为单位）以测量当时的扩散器以及在整个过程中仪器响应的变化。任务开始后的时间。

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