Field evaluation of a diffuse to global irradiance meter for vicarious calibration

Jody Smith, Kurtis Thome, Blake Crowther, Stuart F Biggar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Vicarious calibration methods have been developed to calibrate radiometric sensors in-flight. One such method, the irradiance-based method, requires the measurement of the diffuse-to-global (diffuse-to-total) irradiance ratio. A diffuse-to-global irradiance meter has recently been developed by the Remote Sensing Group at the University of Arizona. The instrument uses a baffled integrating sphere as its collector and an occulting disc to block the sun for diffuse-irradiance measurements. Data are collected at 10-nm intervals from 350 to 1100 nm. In this paper, two methods are used to evaluate this instrument. The first relies on the well-known Langley method to determine atmospheric optical thickness from measurements of the direct solar irradiance derived from the difference between the global and diffuse irradiances. Secondly, the diffuse-to-global ratio was used to predict the radiance at the top of the atmosphere. These radiance results are compared to those from the reflectance-based method as well as those derived from data collected by the AVIRIS sensor. Data were collected at Lunar Lake Nevada June 23,24,25 1997 and White Sands Missile Range on October 31 and November 1, 1997. Comparison of optical thickness obtained from data collected by a well-understood solar radiometer show differences in optical thickness ranging from 0.003 minimum to 0.018 maximum. These results are encouraging as they indicate that there are no major effects due to inhomogeneities in the spherical collector.

Original languageEnglish (US)
Title of host publicationInternational Geoscience and Remote Sensing Symposium (IGARSS)
Editors Anon
PublisherIEEE
Pages663-665
Number of pages3
Volume2
StatePublished - 1998
EventProceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5) - Seattle, WA, USA
Duration: Jul 6 1998Jul 10 1998

Other

OtherProceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5)
CitySeattle, WA, USA
Period7/6/987/10/98

Fingerprint

irradiance
Calibration
calibration
Sensors
Radiometers
Missiles
radiance
Sun
Lakes
Remote sensing
Sand
sensor
AVIRIS
inhomogeneity
radiometer
evaluation
method
reflectance
flight
remote sensing

ASJC Scopus subject areas

  • Software
  • Geology

Cite this

Smith, J., Thome, K., Crowther, B., & Biggar, S. F. (1998). Field evaluation of a diffuse to global irradiance meter for vicarious calibration. In Anon (Ed.), International Geoscience and Remote Sensing Symposium (IGARSS) (Vol. 2, pp. 663-665). IEEE.

Field evaluation of a diffuse to global irradiance meter for vicarious calibration. / Smith, Jody; Thome, Kurtis; Crowther, Blake; Biggar, Stuart F.

International Geoscience and Remote Sensing Symposium (IGARSS). ed. / Anon. Vol. 2 IEEE, 1998. p. 663-665.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Smith, J, Thome, K, Crowther, B & Biggar, SF 1998, Field evaluation of a diffuse to global irradiance meter for vicarious calibration. in Anon (ed.), International Geoscience and Remote Sensing Symposium (IGARSS). vol. 2, IEEE, pp. 663-665, Proceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5), Seattle, WA, USA, 7/6/98.
Smith J, Thome K, Crowther B, Biggar SF. Field evaluation of a diffuse to global irradiance meter for vicarious calibration. In Anon, editor, International Geoscience and Remote Sensing Symposium (IGARSS). Vol. 2. IEEE. 1998. p. 663-665
Smith, Jody ; Thome, Kurtis ; Crowther, Blake ; Biggar, Stuart F. / Field evaluation of a diffuse to global irradiance meter for vicarious calibration. International Geoscience and Remote Sensing Symposium (IGARSS). editor / Anon. Vol. 2 IEEE, 1998. pp. 663-665
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