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Proceedings Paper

Calibration of SeaWiFS on orbit
Author(s): Robert A. Barnes; Robert E. Eplee; Wayne D. Robinson; G. Michael Schmidt; Frederick S. Patt; Sean W. Bailey; Menghua Wang; Charles R. McClain
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Paper Abstract

SeaWiFS was launched onboard the OrbView-2 satellite on 1 August 1997. On 4 September 1997, the day of first light for the instrument, SeaWiFS global images were processed automatically using the instrument’s prelaunch calibration and distributed on the World Wide Web. With the first reprocessing of SeaWiFS data in January 1998, the radiometric calibration coefficients for the SeaWiFS visible bands were linked to the water-leaving radiances measured by the Marine Optical Buoy (MOBY). In addition, the calibration coefficient for the 765 nm SeaWiFS infrared band was adjusted to give values consistent with those for an atmosphere with the maritime type of aerosol found in the vicinity of the MOBY buoy. Since the infrared bands were designed to allow the inference of aerosol type for the SeaWiFS atmospheric correction algorithm, this vicarious calibration forces their agreement with the conditions for a known aerosol type. With the second reprocessing in August 1998, temporal changes in the radiometric sensitivities of the SeaWiFS near infrared bands were corrected using lunar and solar measurements. The third SeaWiFS reprocessing in May 2000 introduced small time dependent calibration corrections to some visible bands. Future SeaWiFS reprocessings are scheduled to occur on an annual to biennial basis. With the third reprocessing, the emphasis of the instrument calibration program has shifted to the assessment of the surface truth comparisons used by SeaWiFS, principally those with MOBY.

Paper Details

Date Published: 15 November 2000
PDF: 13 pages
Proc. SPIE 4135, Earth Observing Systems V, (15 November 2000); doi: 10.1117/12.494258
Show Author Affiliations
Robert A. Barnes, SAIC General Sciences Corp. and NASA Goddard Space Flight Ctr. (United States)
Robert E. Eplee, SAIC General Sciences Corp. and NASA Goddard Space Flight Ctr. (United States)
Wayne D. Robinson, SAIC General Sciences Corp. and NASA Goddard Space Flight Ctr. (United States)
G. Michael Schmidt, SAIC General Sciences Corp. and NASA Goddard Space Flight Ctr. (United States)
Frederick S. Patt, SAIC General Sciences Corp. and NASA Goddard Space Flight Ctr. (United States)
Sean W. Bailey, Futuretech Corp. and NASA Goddard Space Flight Ctr. (United States)
Menghua Wang, Univ of Maryland/Baltimore County and NASA Goddard Space Flight Ctr. (United States)
Charles R. McClain, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 4135:
Earth Observing Systems V
William L. Barnes, Editor(s)

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