Submitted to: European Geosciences Union General Assembly Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: February 28, 2006
Publication Date: March 5, 2006
Citation: Ritchie, J.C., Schmugge, T.J., Hsu, A. 2006. Comparison of ASTER, MASTER, Landsat, and ground-based radiance measurements [abstract]. Geophysical Research Abstracts. 8(10460):SRef-ID 1607-7962/gra/EGU06-A-10460.
ASTER, MASTER, Landsat-7, and ASD (Analytical Spectral Devices Spectroradiometer-ground based) radiance measurements taken over the Jornada Experimental Range (Jornada) in southern New Mexico USA provide unique opportunities to compare remote sensing data for arid rangelands from different platforms and at different scales. ASD visible and near infrared radiance data (0.4 to 2.5 microns) for May 12, 2001, October 6, 2002, and May 2, 2003 were analyzed and integrated to match the 21 MASTER and 9 ASTER bandwidths for three different vegetation communities (shrub-mesquite, grass, and shrub-grass transition) at the Jornada. A strong positive correlation with a slope near one between the measurements indicated that the three sensors were measuring similar absolute values from the three vegetation communities. Similar ASD radiance values integrated for four Landsat-7 visible and near infrared bandwidths for the three dates also indicated that the two sensors were measuring similar absolute values from different vegetation communities. Radiance was highest from the shrub community and lowest from the grass community with the shrub-grass transition being intermediate. This has implications for the energy and water budgets of the Jornada where shrub communities are invading and replacing grass communities.