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Making real-time sun reflectance measurements with a microprocessor-based spectroradiometer (1979)

Chapelle, E. W. ; Zweibaum, F. M.

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Publication Date: 2019-07-27

Description: A standard high-speed, field-portable spectroradiometric measurement system built around a programmable microprocessor has been adapted to the form of a Reflectometer/Comparator. In this configuration, the instrument makes passive measurements of the absolute reflectance of agricultural plant canopies over a spectral range of 0.4 to 2.5 micrometers. Real-time absolute measurements are made possible by an optical chopper which constantly compares the target with the sun, and makes extensive measurements of solar reflectance from a variety of these targets. The paper describes the instrumentation and measurement procedures, reviews the software programming and discusses the results.

Keywords: INSTRUMENTATION AND PHOTOGRAPHY

Type: Real-time signal processing II; April 19, 20, 1979; Washington, D. C.

Format: text

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