| Abstract: | Since terrestrial surfaces are anisotropic, all spectral reflectance measurements obtained with a small instantaneous field of view instrument are specific to these angular conditions, and the value of the corresponding NDVI, computed from these bidirectional reflectances, is relative to the particular geometry of illumination and viewing at the time of the measurement. This paper documents the importance of these geometric effects through simulations of the AVHRR data acquisition process, and investigates the systematic biases that result from the combination of ecosystem-specific anisotropies with instrument-specific sampling capabilities. Typical errors in the value of NDVI are estimated, and strategies to reduce these effects are explored. -from Authors |
| Genre: | Article |
| ProdID: | 70018792 |
| Citation Author: | Meyer, D.; Verstraete, M.; Pinty, B. |
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| Citation End Page: | 27 |
| Citation Issue: | 1-2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Remote Sensing Reviews |
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| Citation Number Of Pages: | 25 |
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| Citation Search Results Text: | The effect of surface anisotropy and viewing geometry on the estimation of NDVI from AVHRR; 1995; Article; Journal; Remote Sensing Reviews; Meyer, D.; Verstraete, M.; Pinty, B. |
| Citation Start Page: | 3 |
| Citation Volume: | 12 |
| Citation Year: | 1995 |
| Type: | citation/reference |
| Text: | The effect of surface anisotropy and viewing geometry on the estimation of NDVI from AVHRR; 1995; Article; Journal; Remote Sensing Reviews; Meyer, D.; Verstraete, M.; Pinty, B. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1995 00:00 -0600 |
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