title: Comparative analysis of GOCI ocean color products.
abstract: The Geostationary Ocean Color Imager (GOCI) is the first geostationary ocean color sensor in orbit that provides bio-optical properties from coastal and open waters around the Korean Peninsula at unprecedented temporal resolution. In this study, we compare the normalized water-leaving radiance (nLw) products generated by the Naval Research Laboratory Automated Processing System (APS) with those produced by the stand-alone software package, the GOCI Data Processing System (GDPS), developed by the Korean Ocean Research &amp; Development Institute (KORDI). Both results are then compared to the nLw measured by the above water radiometer at the Ieodo site. This above-water radiometer is part of the Aerosol Robotic NETwork (AeroNET). The results indicate that the APS and GDPS processed  correlates well within the same image slot where the coefficient of determination (r²) is higher than 0.84 for all the bands from 412 nm to 745 nm. The agreement between APS and the AeroNET data is higher when compared to the GDPS results. The Root-Mean-Squared-Error (RMSE) between AeroNET and APS data ranges from 0.24 [mW/(cm²srμm)] at 555 nm to 0.52 [mW/(cm²srμm)]  at 412 nm while RMSE between AeroNET and GDPS data ranges from 0.47 [mW/(cm²srμm)] at 443 nm to 0.69 [mW/(cm²srμm)]  at 490 nm.
authors.affiliation: BioOptoSense LLC, New Orleans, LA 70115, USA. biooptosense@gmail.com.
authors.forename: Ruhul
authors.initials: R
authors.lastname: Amin
authors.affiliation: Naval Research Laboratory, Code 7331, Stennis Space Center, MS 39529, USA. David.Lewis@nrlssc.navy.mil.
authors.forename: Mark David
authors.initials: MD
authors.lastname: Lewis
authors.affiliation: Naval Research Laboratory, Code 7331, Stennis Space Center, MS 39529, USA. Adam.Lawson@nrlssc.navy.mil.
authors.forename: Adam
authors.initials: A
authors.lastname: Lawson
authors.affiliation: Naval Research Laboratory, Code 7331, Stennis Space Center, MS 39529, USA. Richard.Gould@nrlssc.navy.mil.
authors.forename: Richard W
authors.initials: RW
authors.lastname: Gould
authors.affiliation: Vencore, Inc., Stennis Space Center, MS 39529, USA. Paul.Martinolich.ctr@nrlssc.navy.mil.
authors.forename: Paul
authors.initials: P
authors.lastname: Martinolich
authors.affiliation: Naval Research Laboratory, Code 7231, Building 2, Washington, DC 20375, USA. rong-rong.li@nrl.navy.mil.
authors.forename: Rong-Rong
authors.initials: RR
authors.lastname: Li
authors.affiliation: Naval Research Laboratory, Code 7331, Stennis Space Center, MS 39529, USA. Sherwin.Ladner@nrlssc.navy.mil.
authors.forename: Sherwin
authors.initials: S
authors.lastname: Ladner
authors.affiliation: Naval Research Laboratory, Code 7331, Stennis Space Center, MS 39529, USA. Sonia.Gallegos@nrlssc.navy.mil.
authors.forename: Sonia
authors.initials: S
authors.lastname: Gallegos
mesh_terms: D003116:Color; D004784:Environmental Monitoring / Q000379:methods*; D040362:Geographic Information Systems; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D009792:Oceans and Seas; D018531:Spacecraft
keywords: APS; GDPS; bio-optical products; geostationary satellite; ocean color remote sensing