DETECTION AND MONITORING OF WATER QUALITY INDICATORS SUCH AS HARMFUL ALGAL BLOOMS AND SUSPENDED SEDIMENTS CAN BE DERIVED FROM OCEAN COLOR RADIOMETRY: THE SPECTRAL RADIANCE OF LIGHT UPWELLING FROM BENEATH THE OCEAN SURFACE. THE RETRIEVAL OF OCEAN COLOR FROM AIRBORNE OR SPACEBORNE OBSERVATIONS REQUIRES ATMOSPHERIC CORRECTION TO REMOVE THE CONTRIBUTION OF THE ATMOSPHERE. ACCURATE ATMOSPHERIC CORRECTION IS CHALLENGING IN THE COASTAL AND INLAND WATERS WHERE WATER QUALITY IS OF GREATEST CONCERN TO HUMAN HEALTH AND FISHERIES DUE TO THE GREATER COMPLEXITY OF THE ATMOSPHERE AND WATER BODIES. THIS COMPLEXITY INCLUDES THE INFLUENCE OF ABSORBING AEROSOLS AND ASSOCIATED UNCERTAINTY DUE TO AEROSOL LAYER HEIGHT AND TURBID OR HIGHLY PRODUCTIVE WATERS WHERE SEPARATION BETWEEN THE WATER AND AEROSOL SIGNAL IS DIFFICULT DUE TO NON-ZERO WATER LEAVING RADIANCE IN THE NEAR INFRARED (NIR). TO IMPROVE THE CAPABILITY OF WATER QUALITY REMOTE SENSING ALGORITHMS WE PROPOSE TO DEVELOP A NEW ATMOSPHERIC CORRECTION ALGORITHM APPLICABLE TO COASTAL AND INLAND WATERS BY USING CO-LOCATED POLARIMETRIC AND OCEAN COLOR OBSERVATIONS. THIS PROPOSAL IS RESPONSIVE TO SECTION 2.2.1: ATMOSPHERIC CORRECTIONS OF REMOTE SENSING OF WATER QUALITY (RSWQ) IN NASA ROSES-2016.