A new paradigm for ocean color satellite calibration and validation: accurate measurements of hyperspectral water leaving radiance from autonomous profiling floats (HYPERNAV)

Barnard, Andrew H.; Dommelen, Ronnie Van; Boss, Emmanuel; Plache, B.; Simontov, Vlad; Orrico, Cristina; Walter, Dave; Lewis, Marlon R.; Carlson, Daryl

doi:10.1002/essoar.10500047.1

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…In regard to comparing this study to the literature, a similar technological solution can be artificially constructed by considering the instrumentation of autonomous floats equipped with either multispectral [36] or hyperspectral [37] radiometers. Ref.…”

Section: Autonomous Observations Of Aquatic Ecosystems Using An Sv3 P...mentioning

confidence: 99%

Verification and Validation of Hybridspectral Radiometry Obtained from an Unmanned Surface Vessel (USV) in the Open and Coastal Oceans

et al. 2022

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The hardware and software capabilities of the compact-profiling hybrid instrumentation for radiometry and ecology (C-PHIRE) instruments on an unmanned surface vessel (USV) are evaluated. Both the radiometers and USV are commercial-off-the-shelf (COTS) products, with the latter being only minimally modified to deploy the C-PHIRE instruments. The hybridspectral C-PHIRE instruments consist of an array of 18 multispectral microradiometers with 10 nm wavebands spanning 320–875nm plus a hyperspectral compact grating spectrometer (CGS) with 2048 pixels spanning 190–1000nm. The C-PHIRE data were acquired and processed using two architecturally linked software packages, thereby allowing lessons learned in one to be applied to the other. Using standard data products and unbiased statistics, the C-PHIRE data were validated with those from the well-established compact-optical profiling system (C-OPS) and verified with the marine optical buoy (MOBY). Agreement between algorithm variables used to estimate colored dissolved organic matter (CDOM) absorption and chlorophylla concentration were also validated. Developing and operating novel technologies, such as the C-PHIRE series of instruments , deployed on a USV increase the frequency and coverage of optical observations, which are required to fully support the present and next-generation validation exercises in radiometric remote sensing of aquatic ecosystems.

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Section: Autonomous Observations Of Aquatic Ecosystems Using An Sv3 P...mentioning

confidence: 99%

Verification and Validation of Hybridspectral Radiometry Obtained from an Unmanned Surface Vessel (USV) in the Open and Coastal Oceans

et al. 2022

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“…Of note, MOBY (https://mlml.sjsu.edu/moby/) moored off the island of Lanai, HI, USA, is a radiometry resource used for SVC of ocean color sensors since the launch of NASA's SeaWiFS that has been in continuous operation since 1997 (Voss et al., 2017). For the suite of new hyperspectral satellites, similar moored platforms in historic and new locations and different platforms like profiling systems are being considered, all equipped with high‐quality hyperspectral radiometric instruments (Antoine et al., 2020; Barnard et al., 2022; Liberti et al., 2020). All SVC data sources are expected to be made available to PACE, GLIMR, and SBG, as well as the international community at‐large.…”

Section: Calibration and Validationmentioning

confidence: 99%

Synergies Between NASA's Hyperspectral Aquatic Missions PACE, GLIMR, and SBG: Opportunities for New Science and Applications

Dierssen,

Gierach,

Guild

et al. 2023

JGR Biogeosciences

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Within the next decade, NASA plans to launch three new missions with imaging spectrometers for aquatic science and applications: Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) in 2024, Geostationary Littoral Imaging Radiometer (GLIMR) in 2026, and Surface Biology and Geology (SBG) in 2028. Together these missions will evaluate long‐term trends in phytoplankton biomass linked to climate change, and provide new spectral capabilities to assess aquatic biogeochemistry, biophysics, and habitats. Hyperspectral measurements of ocean color, paired with advanced retrieval algorithms, can provide new information on phytoplankton community composition and water quality. We compare the mission architecture and sensor characteristics to identify the synergistic opportunities to merge algorithms, field data, and calibration and validation techniques. Each mission has unique temporal and spatial characteristics to monitor the aquatic transitions from watershed to open ocean ecosystems. SBG provides observations at high spatial scales to monitor emergent, floating, submerged and benthic habitats from inland to coastal waters. With global daily coverage, PACE can track the fate of material as it meanders offshore and provides an enhanced context for phytoplankton diversity and global biogeochemical cycling. GLIMR is optimized to resolve temporal processes that give rise to aquatic rates and fluxes including phytoplankton growth rates, physiology and episodic events such as storms. Applications with high spectral, spatial, and temporal resolution from these NASA missions include assessing carbon dynamics and biogeochemical cycling across the land‐ocean continuum, harmful algal blooms and oil spills.

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“…The deployment of hyperspectral radiometers on unattended platforms like Argo floats applies higher demands on the capabilities of the sensors than conventional in-water radiometry. Some studies which performed hyperspectral light field measurements using drifting devices (Zielinski et al, 2006;Barnard et al, 2018) have already demonstrated stable shortterm field deployment of autonomous hyperspectral radiance and irradiance measurements. However, both studies highlight the importance of technical features like radiometer power consumption, long-term stability and reliability, standardized interfaces and protocols, as well as intelligent data handling.…”

Section: Future Prospectsmentioning

confidence: 99%

Radiometry on Argo Floats: From the Multispectral State-of-the-Art on the Step to Hyperspectral Technology

Jemai¹,

Wollschläger²,

Voß³

2021

Front. Mar. Sci.

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Over the past two decades, robotic technology such as Argo floats have revolutionized operational autonomous measurement of the oceans. Recently, Biogeochemical Argo floats (BGC-Argo floats) have measured optical and biogeochemical quantities down to a depth of 2,000 m. Among these parameters, are measurements of the underwater light field from which apparent optical properties (AOPs), such as the diffuse attenuation coefficient for downwelling irradiance Kd(λ), can be derived. Presently, multispectral observations are available on this platform at three wavelengths (with 10–20 nm bandwidths) in the ultraviolet and visible part of the spectrum plus the Photosynthetically Available Radiation (PAR; integrated radiation between 400 and 700 nm). This article reviews studies dealing with these radiometric observations and presents the current state-of-the-art in Argo radiometry. It focus on the successful portability of radiometers onboard Argo float platforms and covers applications of the obtained data for bio-optical modeling and ocean color remote sensing. Generating already high-quality datasets in the existing configuration, the BGC-Argo program must now investigate the potential to incorporate hyperspectral technology. The possibility to acquire hyperspectral information and the subsequent development of new algorithms that exploit these data will open new opportunities for bio-optical long-term studies of global ocean processes, but also present new challenges to handle and process increased amounts of data.

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A new paradigm for ocean color satellite calibration and validation: accurate measurements of hyperspectral water leaving radiance from autonomous profiling floats (HYPERNAV)

Cited by 4 publications

References 5 publications

Verification and Validation of Hybridspectral Radiometry Obtained from an Unmanned Surface Vessel (USV) in the Open and Coastal Oceans

Verification and Validation of Hybridspectral Radiometry Obtained from an Unmanned Surface Vessel (USV) in the Open and Coastal Oceans

Synergies Between NASA's Hyperspectral Aquatic Missions PACE, GLIMR, and SBG: Opportunities for New Science and Applications

Radiometry on Argo Floats: From the Multispectral State-of-the-Art on the Step to Hyperspectral Technology

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