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Proceedings Paper

Evaluation of VIIRS ocean color products
Author(s): Menghua Wang; Xiaoming Liu; Lide Jiang; SeungHyun Son; Junqiang Sun; Wei Shi; Liqin Tan; Puneeta Naik; Karlis Mikelsons; Xiaolong Wang; Veronica Lance
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Paper Abstract

The Suomi National Polar-orbiting Partnership (SNPP) was successfully launched on October 28, 2011. The Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi NPP, which has 22 spectral bands (from visible to infrared) similar to the NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS), is a multi-disciplinary sensor providing observations for the Earth’s atmosphere, land, and ocean properties. In this paper, we provide some evaluations and assessments of VIIRS ocean color data products, or ocean color Environmental Data Records (EDR), including normalized water-leaving radiance spectra nLw(λ) at VIIRS five spectral bands, chlorophyll-a (Chl-a) concentration, and water diffuse attenuation coefficient at the wavelength of 490 nm Kd(490). Specifically, VIIRS ocean color products derived from the NOAA Multi-Sensor Level-1 to Level-2 (NOAA-MSL12) ocean color data processing system are evaluated and compared with MODIS ocean color products and in situ measurements. MSL12 is now NOAA’s official ocean color data processing system for VIIRS. In addition, VIIRS Sensor Data Records (SDR or Level- 1B data) have been evaluated. In particular, VIIRS SDR and ocean color EDR have been compared with a series of in situ data from the Marine Optical Buoy (MOBY) in the waters off Hawaii. A notable discrepancy of global deep water Chl-a derived from MODIS and VIIRS between 2012 and 2013 is observed. This discrepancy is attributed to the SDR (or Level-1B data) calibration issue and particularly related to VIIRS green band at 551 nm. To resolve this calibration issue, we have worked on our own sensor calibration by combining the lunar calibration effect into the current calibration method. The ocean color products derived from our new calibrated SDR in the South Pacific Gyre show that the Chl-a differences between 2012 and 2013 are significantly reduced. Although there are still some issues, our results show that VIIRS is capable of providing high-quality global ocean color products in support of science research and operational applications. The VIIRS evaluation and monitoring results can be found at the website: http://www.star.nesdis.noaa.gov/sod/mecb/color/index.html.

Paper Details

Date Published: 10 December 2014
PDF: 15 pages
Proc. SPIE 9261, Ocean Remote Sensing and Monitoring from Space, 92610E (10 December 2014); doi: 10.1117/12.2069251
Show Author Affiliations
Menghua Wang, NOAA National Environmental Satellite, Data, and Information Service (United States)
Xiaoming Liu, NOAA National Environmental Satellite, Data, and Information Service (United States)
Colorado State Univ. (United States)
Lide Jiang, NOAA National Environmental Satellite, Data, and Information Service (United States)
Colorado State Univ. (United States)
SeungHyun Son, NOAA National Environmental Satellite, Data, and Information Service (United States)
Colorado State Univ. (United States)
Junqiang Sun, NOAA National Environmental Satellite, Data, and Information Service (United States)
Global Science & Technology, Inc. (United States)
Wei Shi, NOAA National Environmental Satellite, Data, and Information Service (United States)
Colorado State Univ. (United States)
Liqin Tan, NOAA National Environmental Satellite, Data, and Information Service (United States)
Colorado State Univ. (United States)
Puneeta Naik, NOAA National Environmental Satellite, Data, and Information Service (United States)
Colorado State Univ. (United States)
Karlis Mikelsons, NOAA National Environmental Satellite, Data, and Information Service (United States)
Global Science & Technology, Inc. (United States)
Xiaolong Wang, NOAA National Environmental Satellite, Data, and Information Service (United States)
Colorado State Univ. (United States)
Veronica Lance, NOAA National Environmental Satellite, Data, and Information Service (United States)
Global Science & Technology, Inc. (United States)


Published in SPIE Proceedings Vol. 9261:
Ocean Remote Sensing and Monitoring from Space
Robert J. Frouin; Delu Pan; Hiroshi Murakami, Editor(s)

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