ABSTRACTS

Oral Session 9 | Thursday, October 6, 10:40–11:00 | Abstract 547

Evaluation of the HyperNAV radiometric system ability to Meet PACE SVC Requirements

The success of satellite ocean color missions relies on the quality of the onboard radiometric instruments, robust system vicarious calibration (SVC), and supporting ground-based research by the scientific community. Here we focus on HyperNAV, a new SVC system designed to accelerate the process of attaining sufficiently accurate calibration coefficients and to provide a spatially extensive network beyond the MOBY SVC site. The HyperNAV SVC system consists of hyperspectral radiometers mounted on an autonomous float and an end-to-end automated data processing stream aimed at delivering matchups for calibration of ocean color sensors and validation of the derived water-leaving radiance (Lw). Comparisons between measurements of underwater upward radiance just beneath the surface (Lu) made by HyperNAV in Hawaii and the Mediterranean Sea and by state-of-the-art instruments used for either vicarious calibration (e.g., MOBY) or validation (e.g., SeaBird Scientific HyperPro) as well as retrievals by current ocean color sensors (e.g., VIIRS, MODIS) are presented. Preliminary results show good agreement (within 5%) between HyperNAV and MOBY Lw measurements. This work demonstrates the HyperNAV system capability to deliver high spectral resolution, high accuracy, and low uncertainty normalized water-leaving radiance spectrum to the NASA PACE team shortly following PACE’s launch.

Nils Haëntjens, University of Maine, 0000-0002-7155-2721

Emmanuel Boss, University of Maine

Robert Frouin, Scripps Institution of Oceanography

Cristina Orrico, Sea-Bird Scientific

Andrew Barnard, Sea-Bird Scientific