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ARS Home » Research » Publications at this Location » Publication #131327
Title: THE POTENTIALITIES OF ASTER SENSOR FOR ESTIMATION OF SURFACE RADIATIVE PROPERTIES

Author
item JACOB, FREDERIC - VISITING SCIENTIST HRSL
item Schmugge, Thomas
item French, Andrew

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/7/2002
Publication Date: 9/16/2002
Citation: N/A

Interpretive Summary:

Technical Abstract: The ASTER sensor provides remote sensing data with a high spatial resolution in the visible, near infrared, short wave infrared and thermal infrared spectral domains. Three datasets were acquired simultaneously over the Jornada Experimental Range using the ASTER spaceborne sensor, the MASTER airborne sensor and ground based measurements. The objective of this sstudy is to estimate the surface radiative properties using the ASTER and MASTER images, and next, to assess the quality by comparing the three data sets. Spaceborne and airborne data are atmospherically corrected using the MODTRAN 4 radiative transfer model along with radiosoundings. Albedo is computed from off nadir measurements using a narrowband to broadband conversion. The fraction vegetation cover is computed using Normalized Difference Vegetation Index through an empirical relationship. The kinetic temperature is calculated using the Temperature Emissivity Separation (TES) )algorithm. The impact of the atmosphere characterization is estimated through a comparison of the radiative variables computed using different radiosoundings launched near the Jornada site. Finally, a validation is performed comparing airborne estimates against ground measurements and next spaceborne data against airborne ones. The final objective is to obtain a very good accuracy on the ASTER products, such as 5% in relative on albedo and between 0.5 and 1 K on kinetic temperature.