optical remote sensing, image processing, Seasat-A scatterometer, advanced very high resolution radiometer, NDVI, enhanced resolution image reconstruction
A scientific effort is currently underway to assess tropical forest degradation and its potential impact on Earth's climate. Because of the large continental regions involved, Advanced Very High Resolution Radiometer (AVHRR) imagery and its derivative vegetation index products with resolutions between 1 and 12 km are typically used to inventory the Earth's equatorial vegetation. Archival AVHRR imagery is also used to obtain a temporal baseline of historical forest extent. Recently however, 50-km Seasat-A Scatterometer (SASS) Ku-band imagery (acquired in 1978) has been reconstructed to = 4-km resolution, making it a supplement to AVHRR imagery for historical vegetation assessment. In order to test the utility of reconstructed Ku-band scatterometer imagery for this purpose, seasonal AVHRR vegetation-index and SASS images of identical resolutions were constructed. Using the imagery, discrimination experiments involving 18 vegetation categories were conducted for a central South America study area. The results of these experiments indicate that AVHRR vegetation-index images are slightly superior to reconstructed SASS images for differentiating between equatorial vegetation classes when used alone. However, combining the scatterometer imagery with the vegetation-index images provides discrimination superior to any other combination of the data sets. Using the two data sets together, 90.3% of the test data could be correctly classified into broad classes of equatorial forest, degraded woodland/forest, woodland/savanna, and caatinga.
Original Publication Citation
Hardin, Perry J., Long, David G. "Integrating reconstructed scatterometer and advanced very high resolution radiometer data for tropical forest inventory." Optical Engineering 34.11 (1995): 3146-3153
BYU ScholarsArchive Citation
Long, David G. and Hardin, Perry J., "Integrating reconstructed scatterometer and advanced very high resolution radiometer data for tropical forest inventory" (1995). All Faculty Publications. 685.
Ira A. Fulton College of Engineering and Technology
Electrical and Computer Engineering
© 1995 SPIE This paper was published in Optical Engineering and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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