HR: 13:40h
AN: H23H-01    [Abstracts]
TI: Validation of the ASTER Temperature Emissivity Separation (TES) algorthim with field measurements
AU: * Schmugge, T
EM: schmugge@nmsu.edu
AF: New Mexico State University, College of Agriculture MSC 3AG P.O. Box 30003, Las Cruces, NM 88003-8003 United States
AU: Ogawa, K
EM: ogawa@gpl.t.u-tokyo.ac.jp
AF: School of Engineering University of Tokyo, Tokyo, 113-8656, Tokyo, 113-8656 Japan
AU: French, A N
EM: afrench@uswcl.ars.ag.gov
AF: U.S. Water Conservation Laboratory USDA/ARS, 4331 E. Broadway Rd., Phoenix, AZ 85040-8832 United States
AB: The temperature emissivity separation (TES) algorithm developed for use with the multi-channel (5) thermal infrared data from the Advanced Spaceborne Thermal Emission & Reflection (ASTER) radiometer on NASA's Terra satellite makes use of an empirical relation between the range of emissivities for the 5 channels and their minimum. TES was tested using a field radiometer (CIMEL 312) with 5 bands that are very similar to those of ASTER for a range of soils from the Jornada Experimental Range in New Mexico. The measurements were made with the CIMEL at the site and a sample of the soil was sent to the Jet Propulsion Laboratory for measurements of their spectral emissivities. The agreement between the emissivities determined from the field measurements using TES and laboratory data was very good ( < 0.02) for most cases. Differences were observed for those cases in which the field soil had formed a consolidated crust which deteriorated into a powder when the soil was measured in the lab. Even in these cases the spectral shapes were similar. The effect of the crust was to lower the emissivity, i.e raise the reflectivity. Measurements of the sky brightness were made with the CIMEL to compensate for the downwelling radiation in the emissivity calculation. These results validate the basic approach for the TES algorithm and its use for emissivity determination with ASTER satellite data.
DE: 1818 Evapotranspiration
DE: 1843 Land/atmosphere interactions (1218, 1631, 3322)
DE: 1855 Remote sensing (1640)
DE: 1865 Soils (0486)
DE: 1895 Instruments and techniques: monitoring
SC: Hydrology [H]
MN: Fall Meeting 2005