Technical Abstract: The JORNada Experiment (JORNEX) on the USDA/ARS Jornada Experimental Range aims to describe the surface energy balance of a desert grassland ecosystems through the use of remotely sensed data. Airborne data with a spatial resolution of 4m have been used to infer characteristic length scales of the following surface parameter: surface temperature, albedo and NDVI. These length scales have been determined with both variogram and wavelet analysis. Three sites with different vegetation types were studied: grass, shrub and a mixture of the two. Both techniques gave similar results. As expected the grass site with most uniformity had the longest length scales and the shrub sites had the shortest for all three parameters.