Radiometric calibration of aircraft and satellite sensors at White Sands, NM

B. L. Markham, J. R. Irons, D. W. Deering, R. N. Halthore, R. R. Irish, R. D. Jackson, M. S. Moran, S. F. Biggar, D. I. Gellman, B. G. Grant, J. M. Palmer, P. N. Slater

Research output: Contribution to conferencePaperpeer-review

8 Scopus citations

Abstract

Multiple-angle data collected in November 1988 with the Advanced Solid-State Array Spectroradiometer (ASAS), an airborne pointable imaging spectrometer covering the 450-870-nm range, have been analyzed for two sites in the gypsum sand area of White Sands, NM. Comparison of the ASAS data to surface measurements suggests that in the central portion (550-750 nm) of the spectral coverage the radiometric calibration is good (±5%), but it is less accurate at shorter or longer wavelengths. Retrieved bidirectional reflectances (BRFs) in the principal plane of the sun (53° solar zenith angle (SZA)) showed variation in both the magnitude and shape of the BRF in the alkali flat areas. The effective principal plane BRF (54° SZA) of sand dune areas departed from that of flat dune sand, particularly at forward scatter angles, due to shadowing. Current results indicate that when using White Sands as a calibration site, laboratory bidirectional measurements of gypsum sand do not adequately describe field behavior. Also, extrapolation of field bidirectional data to areas not measured may not be warranted.

Original languageEnglish (US)
Pages515-518
Number of pages4
StatePublished - Dec 1 1990
Externally publishedYes
Event10th Annual International Geoscience and Remote Sensing Symposium - IGARSS '90 - College Park, MD, USA
Duration: May 20 1990May 20 1990

Other

Other10th Annual International Geoscience and Remote Sensing Symposium - IGARSS '90
CityCollege Park, MD, USA
Period5/20/905/20/90

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

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