Translator Disclaimer
Paper
13 September 2011 Uncertainty assessment of the SeaWiFS on-orbit calibration
Author Affiliations +
Abstract
Ocean color climate data records require water-leaving radiances with 5% absolute and 1% relative accuracies as input. Because of the amplification of any sensor calibration errors by the atmospheric correction, the 1% relative accuracy requirement translates into a 0.1% long-term radiometric stability requirement for top-of-theatmosphere radiances. The rigorous on-orbit calibration program developed and implemented for SeaWiFS by the NASA Ocean Biology Processing Group (OBPG) Calibration and Validation Team (CVT) has allowed the CVT to maintain the stability of the radiometric calibration of SeaWiFS at 0.13% or better over the mission. The uncertainties in the resulting calibrated top-of-the-atmosphere (TOA) radiances can be addressed in terms of accuracy (biases in the measurements), precision (scatter in the measurements), and stability (repeatability of the measurements). The calibration biases of lunar observations relative to the USGS RObotic Lunar Observatory (ROLO) photometric model of the Moon are 2-3%. The biases from the vicarious calibration against the Marine Optical Buoy (MOBY) are 1-2%. The precision of the calibration derived from the solar calibration signal-tonoise ratios are 0.16%, from the lunar residuals are 0.13%, and from the vicarious gains are 0.10%. The long-term stability of the TOA radiances, derived from the lunar time series, is 0.13%. The stability of the vicariouslycalibrated TOA radiances, incorporating the uncertainties in the MOBY measurements and the atmospheric correction, is 0.30%. These results allow the OBPG to produce climate data records from the SeaWiFS ocean color data.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert E. Eplee Jr., Gerhard Meister, Frederick S. Patt, Bryan A. Franz, and Charles R. McClain "Uncertainty assessment of the SeaWiFS on-orbit calibration", Proc. SPIE 8153, Earth Observing Systems XVI, 81530B (13 September 2011); https://doi.org/10.1117/12.892340
PROCEEDINGS
17 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Ocean color estimation by Himawari-8/AHI
Proceedings of SPIE (May 07 2016)
Early on-orbit calibration results from Aqua MODIS
Proceedings of SPIE (April 08 2003)
MODIS solar reflective calibration traceability
Proceedings of SPIE (August 21 2009)
Comparison of SeaWiFS on-orbit lunar and vicarious calibrations
Proceedings of SPIE (September 07 2006)
On orbit calibration of SeaWiFS revised temperature and gain...
Proceedings of SPIE (September 26 2007)

Back to Top