Instrument for retrieval of BRDF data for vicarious calibration

P. Nandy; K. Thome; S. Biggar

doi:10.1109/igarss.1998.699511

Instrument for retrieval of BRDF data for vicarious calibration

P. Nandy, K. Thome, S. Biggar

Optical Sciences

Research output: Contribution to conference › Paper › peer-review

9 Scopus citations

Abstract

The University of Arizona's Remote Sensing Group has performed vicarious calibrations of satellite and airborne sensors since the mid-1980s. Improvements of the accuracy of these techniques requires that the bi-directional reflectance of the test sites be characterized. The Remote Sensing Group has developed a four-band, imaging radiometer based on a two-dimensional CCD array and 8-mm fisheye lens for the retrieval of bidirectional reflectance. This paper describes the design of this radiometer and the methods used to calibrate the system. The calibration is based upon measurements of a 40-inch spherical integrating source and we describe a method to separate the spatial inhomogeneity of the source from that of the CCD array. Early data collected with this instrument of test sites at White Sands Missile Range and Lunar Lake Playa are presented and show good agreement with previous data collected at these or similar sites.

Original language	English (US)
Pages	562-564
Number of pages	3
DOIs	https://doi.org/10.1109/igarss.1998.699511
State	Published - 1998
Event	Proceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5) - Seattle, WA, USA Duration: Jul 6 1998 → Jul 10 1998

Other

Other	Proceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5)
City	Seattle, WA, USA
Period	7/6/98 → 7/10/98

ASJC Scopus subject areas

Computer Science Applications
General Earth and Planetary Sciences

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10.1109/igarss.1998.699511

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title = "Instrument for retrieval of BRDF data for vicarious calibration",

abstract = "The University of Arizona's Remote Sensing Group has performed vicarious calibrations of satellite and airborne sensors since the mid-1980s. Improvements of the accuracy of these techniques requires that the bi-directional reflectance of the test sites be characterized. The Remote Sensing Group has developed a four-band, imaging radiometer based on a two-dimensional CCD array and 8-mm fisheye lens for the retrieval of bidirectional reflectance. This paper describes the design of this radiometer and the methods used to calibrate the system. The calibration is based upon measurements of a 40-inch spherical integrating source and we describe a method to separate the spatial inhomogeneity of the source from that of the CCD array. Early data collected with this instrument of test sites at White Sands Missile Range and Lunar Lake Playa are presented and show good agreement with previous data collected at these or similar sites.",

author = "P. Nandy and K. Thome and S. Biggar",

year = "1998",

doi = "10.1109/igarss.1998.699511",

language = "English (US)",

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note = "Proceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5) ; Conference date: 06-07-1998 Through 10-07-1998",

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AU - Nandy, P.

AU - Thome, K.

AU - Biggar, S.

PY - 1998

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N2 - The University of Arizona's Remote Sensing Group has performed vicarious calibrations of satellite and airborne sensors since the mid-1980s. Improvements of the accuracy of these techniques requires that the bi-directional reflectance of the test sites be characterized. The Remote Sensing Group has developed a four-band, imaging radiometer based on a two-dimensional CCD array and 8-mm fisheye lens for the retrieval of bidirectional reflectance. This paper describes the design of this radiometer and the methods used to calibrate the system. The calibration is based upon measurements of a 40-inch spherical integrating source and we describe a method to separate the spatial inhomogeneity of the source from that of the CCD array. Early data collected with this instrument of test sites at White Sands Missile Range and Lunar Lake Playa are presented and show good agreement with previous data collected at these or similar sites.

AB - The University of Arizona's Remote Sensing Group has performed vicarious calibrations of satellite and airborne sensors since the mid-1980s. Improvements of the accuracy of these techniques requires that the bi-directional reflectance of the test sites be characterized. The Remote Sensing Group has developed a four-band, imaging radiometer based on a two-dimensional CCD array and 8-mm fisheye lens for the retrieval of bidirectional reflectance. This paper describes the design of this radiometer and the methods used to calibrate the system. The calibration is based upon measurements of a 40-inch spherical integrating source and we describe a method to separate the spatial inhomogeneity of the source from that of the CCD array. Early data collected with this instrument of test sites at White Sands Missile Range and Lunar Lake Playa are presented and show good agreement with previous data collected at these or similar sites.

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Instrument for retrieval of BRDF data for vicarious calibration

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