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首页> 外文会议>Calibration of Passive Remote Observing Optical and Microwave Instrumentation >In-flight calibration of a helicopter-mounted Daedalus multispectral scanner
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In-flight calibration of a helicopter-mounted Daedalus multispectral scanner

机译：直升机安装的Daedalus多光谱扫描仪的飞行中校准

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摘要

Abstract: A convenient technique that has been used to calibrate, in-flight, a helicopter-mounted Daedalus multispectral scanner is described. It used four large canvas panels laid out in a square with a Spectralon panel as a reference. A calibrated Barnes modular multispectral radiometer, carried on a 2.2-m boom, was rotated around a 2.5-m high tripod at the center of the square. The radiometer sampled the four large panels and the Spectralon panel once every two minutes. Atmospheric spectral transmittance measurements were made using a filter radiometer on an autotracking mount during the morning of the flight. The reflectance and optical depth data were used in an atmospheric radiative transfer code to predict the spectral radiances at the scanner. The calibration was completed by comparing the image digital counts to the predicted spectral radiances.!
机译：摘要：描述了一种用于校准飞行中直升机的Daedalus多光谱扫描仪的便捷技术。它使用四个以正方形放置的大画布面板，以Spectralon面板作为参考。经过校准的Barnes模块化多光谱辐射计，在2.2米的吊杆上进行旋转，绕着正方形中央的2.5米高的三脚架旋转。辐射计每两分钟对四个大面板和Spectralon面板采样一次。在飞行的早晨，使用自动跟踪安装座上的滤光片辐射计进行了大气光谱透射率的测量。反射率和光学深度数据用于大气辐射传输代码中，以预测扫描仪的光谱辐射率。通过将图像数字计数与预测的光谱辐射率进行比较来完成校准。

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