The NASA OBPG 2020 on-orbit calibration of SNPP VIIRS for ocean color applications

Robert E. Eplee Jr.; Gerhard Meister; Frederick S. Patt; Kevin R. Turpie; Sean W. Bailey; Bryan A. Franz

doi:10.1117/12.2528769

9 September 2019 The NASA OBPG 2020 on-orbit calibration of SNPP VIIRS for ocean color applications

Robert E. Eplee Jr., Gerhard Meister, Frederick S. Patt, Kevin R. Turpie, Sean W. Bailey, Bryan A. Franz

Proceedings Volume 11127, Earth Observing Systems XXIV; 111271A (2019) https://doi.org/10.1117/12.2528769
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

The NASA Ocean Biology Processing Group (OBPG) has continued monitoring the SNPP VIIRS on-orbit calibration for bands M1-M11 over its mission to optimize the calibration for ocean color applications. The OBPG has recently implemented several changes to the calibration scheme: using solar-derived f-factors to detrend the lunar observations; using long-term exponentials of time as basis vectors (along with libration angles) for radiometric fits to any resulting lunar temporal drifts; deriving gain adjustments to the solar f-factors from these exponentials; and deriving gain adjustments due to modulated RSRs outside of the solar/lunar calibration using TOA reference spectra. These calibration changes minimize the impact of uncertainties in any one component of the calibration on the derived f-factors. The final f-factors incorporate VIIRS solar diffuser measurements, h-factor BRDF corrections, lunar-derived gains, and modulated RSR gains. The combined BRDF corrections, lunar gain adjustments, and mRSR gain adjustments define effective h-factors for each band. The improvements in the on-orbit calibration are validated by evaluation of globally-derived anomaly plots of remote sensing reflectance for the ocean color bands. The ultimate goal of the OBPG calibration effort is incorporation of a consistent SNPP VIIRS ocean color data set into the NASA multi-mission ocean color climate data record.

Conference Presentation

Citation Download Citation

Robert E. Eplee Jr., Gerhard Meister, Frederick S. Patt, Kevin R. Turpie, Sean W. Bailey, and Bryan A. Franz "The NASA OBPG 2020 on-orbit calibration of SNPP VIIRS for ocean color applications", Proc. SPIE 11127, Earth Observing Systems XXIV, 111271A (9 September 2019); https://doi.org/10.1117/12.2528769

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available