In-flight calibration of a helicopter-mounted Daedalus multispectral scanner

Lee K. Balick; Charles J. Golanics; Janet E. Shines; Stuart F. Biggar; Philip N. Slater

doi:10.1117/12.46699

1 August 1991 In-flight calibration of a helicopter-mounted Daedalus multispectral scanner

Lee K. Balick, Charles J. Golanics, Janet E. Shines, Stuart F. Biggar, Philip N. Slater

Proceedings Volume 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation; (1991) https://doi.org/10.1117/12.46699
Event: Orlando '91, 1991, Orlando, FL, United States

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.

Citation Download Citation

Lee K. Balick, Charles J. Golanics, Janet E. Shines, Stuart F. Biggar, and Philip N. Slater "In-flight calibration of a helicopter-mounted Daedalus multispectral scanner", Proc. SPIE 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation, (1 August 1991); https://doi.org/10.1117/12.46699

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