1. US Geological Survey; Southwest Biological Science Center; 1110 E. South Campus Drive, Room 123 Tucson AZ 85721 USA
2. CSIRO Land and Water; Waite Road-Gate 4 Glen Osmond SA Australia
3. Environmental Research Laboratory of the University of Arizona; 2601 E. Airport Dr. Tucson AZ 85706 USA
4. Vegetation Index and Phenology Lab; Electrical and Computer Engineering of the University of Arizona; 1230 E. Speedway Tucson AZ 85721 USA