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Remote sensing of crop type and maturity
Author and Affiliation:
Collins, W.(NASA Goddard Institute for Space Studies, New York, N.Y., United States)
Abstract: A red-shift in the chlorophyll absorption edge of heading wheat and grain sorghum is clearly visible in high-spectral-resolution measurements made from a low-flying aircraft over Imperial Valley, California. The position of the absorption edge shifts progressively toward the longer wavelengths during the crop growth cycle. The red-shift of 7 to 10 nm can be measured by using 10 nm-wide spectral bands, centered at 745 nm and 785 nm. These two bands, plus a band in the pigment absorption region at 670 nm, contain enough information to identify wheat and grain sorghum in the heading stage, to indicate the degree of heading, and to indicate canopy density during the heading stage
Publication Date: Jan 01, 1978
Document ID:
19780037433
(Acquired Dec 01, 1995)
Accession Number: 78A21342
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Journal Article
Publication Information: Photogrammetric Engineering and Remote Sensing; 44; Jan. 197
Publisher Information: United States
Contract/Grant/Task Num: NGR-33-008-191
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Inst. for Space Studies; New York, NY, United States
Description: 13p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AERIAL PHOTOGRAPHY; CROP IDENTIFICATION; HIGH RESOLUTION; RED SHIFT; REMOTE SENSORS; CHLOROPHYLLS; CROP GROWTH; GRAINS (FOOD); SPECTRAL RESOLUTION; WHEAT
Imprint And Other Notes: Photogrammetric Engineering and Remote Sensing, vol. 44, Jan. 1978, p. 43-55.
Miscellaneous Notes: p. 43-55
Availability Source: Other Sources
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