Aquatic ecosystems science using an imaging spectrometer

Ronald Lockwood; Charles M. Bachmann; Michael Chrisp; Corrie Smeaton; Nima Pahlaven; Eric Hochberg; Marcos J. Montes; Bo-Cai Gao; Robert Frouin; Anthony Vodacek; Cedric Fichot; Tom W. Bell; Roy A. Armstrong; Chunyan Li; Laura Kennedy; Steven Gillmer; Linda Fuhrman; Derrick Brouhard; Jade Wang; Kurtis Thome

doi:10.1117/12.2676124

20 October 2023 Aquatic ecosystems science using an imaging spectrometer

Ronald Lockwood, Charles M. Bachmann, Michael Chrisp, Corrie Smeaton, Nima Pahlaven, Eric Hochberg, Marcos J. Montes, Bo-Cai Gao, Robert Frouin, Anthony Vodacek, Cedric Fichot, Tom W. Bell, Roy A. Armstrong, Chunyan Li, Laura Kennedy, Steven Gillmer, Linda Fuhrman, Derrick Brouhard, Jade Wang, Kurtis Thome

Author Affiliations +

Proceedings Volume 12688, Imaging Spectrometry XXVI: Applications, Sensors, and Processing; 126880D (2023) https://doi.org/10.1117/12.2676124
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The study of aquatic ecosystems is an important research area addressing diverse problems such as carbon sequestration in coastal margins and wetlands, kelp and seagrass studies, coral reefs, harmful algal blooms and hypoxia, and carbon cycling in this dynamic environment. The application of an imaging spectrometer to aquatic ecosystem study is particularly challenging due to low water-leaving radiance levels adjacent to the shore region with its higher values. The Committee on Earth Observation Satellites (CEOS) has established more stringent performance standards for the visible/near infrared wavelengths than are typically available in imaging spectrometer designs. We have recently developed a compact form imaging spectrometer, the Chrisp Compact VNIR/SWIR Imaging Spectrometer (CCVIS), that facilitates their modular usage with a wide field telescope without sacrificing performance. The CCVIS design and the operational concept have predicted performance that approaches the CEOS standards. The envisioned satellite implementation requires a pitchback maneuver where the imaging of the slit projected onto the surface is slowly scanned while recording focal plane array readouts at a higher rate thereby avoiding saturation over the land surface while obtaining a high signal-to-noise ratio over the water. The effective frame rate is determined by the time it takes to scan the projected slit one ground sample distance (GSD). This approach has the added benefit of measuring a range of angles during a single GSD acquisition, providing insight into the bidirectional reflectance distribution function (BRDF).

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Ronald Lockwood, Charles M. Bachmann, Michael Chrisp, Corrie Smeaton, Nima Pahlaven, Eric Hochberg, Marcos J. Montes, Bo-Cai Gao, Robert Frouin, Anthony Vodacek, Cedric Fichot, Tom W. Bell, Roy A. Armstrong, Chunyan Li, Laura Kennedy, Steven Gillmer, Linda Fuhrman, Derrick Brouhard, Jade Wang, and Kurtis Thome "Aquatic ecosystems science using an imaging spectrometer", Proc. SPIE 12688, Imaging Spectrometry XXVI: Applications, Sensors, and Processing, 126880D (20 October 2023); https://doi.org/10.1117/12.2676124

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