In-Flight Radiometric Calibration of SNPP VIIRS using Molecular Scattering over Oceanic Oligotrophic Regions

Friday, 19 December 2014
Alain Sei, Northrop Grumman Corporation Redondo Beach, Redondo Beach, CA, United States, Bruce Hauss, DKK, Ruston, LA, United States, Patty Pratt, Northrop Grumman Space Technology, Culver City, CA, United States and Robert Frouin, University of California San Diego, La Jolla, CA, United States
This paper presents the absolute calibration in the visible of the VIIRS sensor on SNPP using Rayleigh scattering techniques over oceanic oligotrophic sites. As demonstrated for a number of sensors (Polder, Meris) the molecular scattering signal may be used as a calibration source in the visible. The quality of the calibration depends in large part on controlling unavoidable contributions to the top of atmosphere reflectance such as gaseous transmittance, aerosols and variations in marine reflectance. The effect of a number of these parameters on the calibration uncertainty and their relative contribution to the calibration error budget is quantified. The technique is then applied to SNPP VIIRS bands M1 (412 nm) through M5 (672 nm).