Rangeland reflectance characteristics measured by aircraft and spacecraft sensors
Dissertation Abstracts International, B 39(7): 3081-3082
Rangeland vegetation and soil measurements were related to composite rangeland reflectance measurements from Landsat multispectral scanners (MSS) and color infrared aerial photographs. Ground data and remote sensor measurements were acquired on six sample dates in three growing seasons from a rangeland study site in north central Texas. The potential for using a normalized infrared/red difference parameter for measuring rangeland vegetation or for monitoring vegetation conditions from satellite or aircraft was indicated. In assessing the relationships between scene components and composite scene reflectance, a sun angle related shadow influence, which generally has been ignored, was identified as being important. Results of this study also strongly suggest that quantitative assessment of vegetation conditions by remote sensing must account for weather related influences on reflectance.