title: Cross calibration of ocean-color bands from moderate resolution imaging spectroradiometer on Terra platform.
abstract: Ocean-color applications require maximum uncertainties in blue-wavelength water-leaving radiances in oligotrophic ocean of approximately 5%. Water-leaving radiances from Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra satellite, however, exhibit temporal drift of the order of 15% as well as sensor changes in response versus scan and polarization sensitivity, which cannot be tracked by onboard calibrators. This paper introduces an instrument characterization approach that uses Earth-view data as a calibration source. The approach models the top of the atmosphere signal over ocean that the instrument is expected to measure, including its polarization, with water-leaving radiances coming from another well-calibrated global sensor. The cross calibration allows for significant improvement in derived MODIS-Terra ocean-color products, with largest changes in the blue wavelengths.
authors.affiliation: Ocean Biology Processing Group, 614.8, National Aeronautics and Space Administration, Goddard Space Flight Center, Maryland 20771, USA. ewa.kwiatkowska@gmail.com
authors.forename: Ewa J
authors.initials: EJ
authors.lastname: Kwiatkowska
authors.forename: Bryan A
authors.initials: BA
authors.lastname: Franz
authors.forename: Gerhard
authors.initials: G
authors.lastname: Meister
authors.forename: Charles R
authors.initials: CR
authors.lastname: McClain
authors.forename: Xiaoxiong
authors.initials: X
authors.lastname: Xiong
mesh_terms: D002138:Calibration; D003116:Color; D003124:Colorimetry / Q000295:instrumentation / Q000592:standards; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000592:standards*; D009792:Oceans and Seas; D018531:Spacecraft / Q000295:instrumentation* / Q000592:standards*; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000592:standards*