NDLI: Remote sensing of vineyard fpar, with implications for irrigation scheduling

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Remote sensing of vineyard fpar, with implications for irrigation scheduling

Content Provider	NASA Technical Reports Server (NTRS)
Author	Johnson, Lee F. Scholasch, Thibaut
Copyright Year	2004
Description	Normalized difference vegetation index (NDVI) data, acquired at two-meter resolution by an airborne ADAR System 5500, were compared with fraction of photosynthetically active radiation (FPAR) absorbed by commercial vineyards in Napa Valley, California. An empirical line correction was used to transform image digital counts to surface reflectance. "Apparent" NDVI (generated from digital counts) and "corrected" NDVI (from reflectance) were both strongly related to FPAR of range 0.14-0.50 (both r(sup 2) = 0.97, P < 0.01). By suppressing noise, corrected NDVI should form a more spatially and temporally stable relationship with FPAR, reducing the need for repeated field support. Study results suggest the possibility of using optical remote sensing to monitor the transpiration crop coefficient, thus providing an enhanced spatial resolution component to crop water budget calculations and irrigation management.
File Size	1126457
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20040046141
Archival Resource Key	ark:/13960/t6sz18384
Language	English
Publisher Date	2004-01-01
Access Restriction	Open
Subject Keyword	Earth Resources And Remote Sensing Irrigation Normalized Difference Vegetation Index Photosynthetically Active Radiation Surface Properties Vineyards Farm Crops Spatial Resolution Remote Sensing Spectral Reflectance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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