ACCURATELY ESTIMATING OCEANIC NET PRIMARY PRODUCTION (NPP) IS IMPERATIVE TO INCREASING OUR UNDERSTANDING OF THE GLOBAL CARBON CYCLE AND IMPROVING OUR ABILITY TO ATTRIBUTE AND PREDICT CHANGES IN EARTH'S CLIMATE. DESPITE THIS NECESSITY CURRENT SATELLITE-BASED NPP ESTIMATES HAVE SIGNIFICANT UNCERTAINTIES AS EVIDENCED BY THE WIDE VARIATION BETWEEN DIFFERENT SATELLITE NPP PRODUCTS. THIS IS DUE IN PART TO A LACK OF ADEQUATE VALIDATION OF MODEL PARAMETERS USED TO PRODUCE THESE ESTIMATES. EFFORTS TO VALIDATE MODELS HAVE BEEN MADE BUT THE IN-SITU DATA USED FOR VALIDATION HAS GENERALLY BEEN TOO LIMITED EITHER SPATIALLY TEMPORALLY OR BOTH TO ACCURATELY EXTRAPOLATE NPP ESTIMATES ON A GLOBAL SCALE. THE WORK PROPOSED HEREIN SEEKS TO IMPROVE THESE NPP ESTIMATES THROUGH ASSIMILATION OF GLOBAL-SCALE IN-SITU OCEANOGRAPHIC TRACER DATA WITH SATELLITE-BASED OBSERVATIONS. THE PROPOSED WORK WILL PRODUCE BIOGEOCHEMICALLY-CONSISTENT NPP ESTIMATES THAT CAN BE APPLIED TO DATA FROM SATELLITE-BASED SENSORS SUCH AS MODIS-AQUA SUOMI VIIRS AND THE UPCOMING PACE MISSION ALONG WITH POTENTIAL TO SUPPORT NASA PROJECTS SUCH AS THE EXPORT PROCESSES IN THE OCEAN FROM REMOTE SENSING (EXPORTS). THE SUPPORT OF THESE MISSIONS WILL HELP NASA TO ADVANCE KNOWLEDGE OF EARTH AS A SYSTEM TO MEET THE CHALLENGES OF ENVIRONMENTAL CHANGE AND TO IMPROVE LIFE ON OUR PLANET WHICH IS STRATEGIC OBJECTIVE 2.2 OF ITS SCIENCE MISSION DIRECTORATE AS WELL AS ACCOMPLISH ITS CARBON CYCLE AND ECOSYSTEMS SCIENCE GOAL WHICH AIMS TO DETECT AND PREDICT CHANGES IN EARTH'S ECOLOGICAL AND BIOGEOCHEMICAL CYCLES INCLUDING LAND COVER BIODIVERSITY AND THE GLOBAL CARBON CYCLE.