NDLI: Preliminary evaluation of spectral, normal and meteorological crop stage estimation approaches

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Preliminary evaluation of spectral, normal and meteorological crop stage estimation approaches

Content Provider	NASA Technical Reports Server (NTRS)
Author	Cate, R. B. Artley, J. A. Doraiswamy, P. C. Kinsler, M. C. Hodges, T. Phinney, D. E.
Copyright Year	1980
Description	Several of the projects in the AgRISTARS program require crop phenology information, including classification, acreage and yield estimation, and detection of episodal events. This study evaluates several crop calendar estimation techniques for their potential use in the program. The techniques, although generic in approach, were developed and tested on spring wheat data collected in 1978. There are three basic approaches to crop stage estimation: historical averages for an area (normal crop calendars), agrometeorological modeling of known crop-weather relationships agrometeorological (agromet) crop calendars, and interpretation of spectral signatures (spectral crop calendars). In all, 10 combinations of planting and biostage estimation models were evaluated. Dates of stage occurrence are estimated with biases between -4 and +4 days while root mean square errors range from 10 to 15 days. Results are inconclusive as to the superiority of any of the models and further evaluation of the models with the 1979 data set is recommended.
File Size	2506072
Page Count	76
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19820011760
Archival Resource Key	ark:/13960/t6k11wj68
Language	English
Publisher Date	1980-10-01
Access Restriction	Open
Subject Keyword	Earth Resources And Remote Sensing Statistical Analysis Earth Resources Program Estimating Ground Truth Crop Calendars Weather Crop Growth Meteorological Parameters Agristars Project Phenology Output Agrometeorology Agriculture Yield Models Wheat Color Infrared Photography Spectral Reconnaissance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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