SeaWiFS Detector and Gain Calibrations: Four Years of On-Orbit Stability

Details SeaWiFS Detector and Gain Calibrations: Four Years of On-Orbit Stability SeaWiFS Detector and Gain Calibrations: Four Years of On-Orbit Stability

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4814..282e&link_type=abstract

Earth Observing Systems VII. Edited by Barnes, William L. Proceedings of the SPIE, Volume 4814, pp. 282-288 (2002).

Computer Science

Scientific paper

The SeaWiFS Project uses daily on-orbit detector and gain calibrations to address issues which arise from the bilinear gain in the SeaWiFS radiometric response function. The bilinear gains provide high sensitivity over the ocean while preventing saturation over clouds or land. The bilinear gains are implemented by averaging the output from three high-sensitivity ocean detectors and one low-sensitivity cloud detector for each band. The calibration issues are: 1) the applicability of time corrections computed from lunar data obtained at one set of instrument gains to ocean data obtained at a different set of gains; and 2) the applicability of time corrections computed from data obtained with all four detectors in each band to the cloud detector alone. The Project uses the gain calibration to monitor the SeaWiFS gain ratios over time. The gain ratios for each detector are computed from measurements at each gain of a constant voltage injected into the post-detector electronics. The gain ratios are stable to within 0.1% over the course of the mission. The Project uses the detector calibrations to compare the response of individual detectors within each band to the response of the four detectors in that band. The detector response is monitored during a modified solar calibration where measurements are obtained from each detector. The departure of the cloud detectors from the four detectors is less than 0.5% for all eight bands. These analyses show that, for SeaWiFS, the time corrections derived from lunar calibrations are applicable to both ocean and land data.

Affiliated with

Also associated with

No associations

Rating

SeaWiFS Detector and Gain Calibrations: Four Years of On-Orbit Stability does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with SeaWiFS Detector and Gain Calibrations: Four Years of On-Orbit Stability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SeaWiFS Detector and Gain Calibrations: Four Years of On-Orbit Stability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1128711