Field calibration and validation of remote-sensing surveys |
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| Authors: | Shachak Pe'eri Andy McLeod Paul Lavoie Seth Ackerman James Gardner Christopher Parrish |
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| Affiliation: | 1. Center for Coastal and Ocean Mapping, University of New Hampshire , Durham , NH , USA shachak@ccom.unh.edu;3. Center for Coastal and Ocean Mapping, University of New Hampshire , Durham , NH , USA;4. US Geological Survey , Woods Hole , MA , 02543 , USA;5. National Oceanic and Atmospheric Administration , Silver Spring , MD , 20910 , USA |
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| Abstract: | The Optical Collection Suite (OCS) is a ground-truth sampling system designed to perform in situ measurements that help calibrate and validate optical remote-sensing and swath-sonar surveys for mapping and monitoring coastal ecosystems and ocean planning. The OCS system enables researchers to collect underwater imagery with real-time feedback, measure the spectral response, and quantify the water clarity with simple and relatively inexpensive instruments that can be hand-deployed from a small vessel. This article reviews the design and performance of the system, based on operational and logistical considerations, as well as the data requirements to support a number of coastal science and management projects. The OCS system has been operational since 2009 and has been used in several ground-truth missions that overlapped with airborne lidar bathymetry (ALB), hyperspectral imagery (HSI), and swath-sonar bathymetric surveys in the Gulf of Maine, southwest Alaska, and the US Virgin Islands (USVI). Research projects that have used the system include a comparison of backscatter intensity derived from acoustic (multibeam/interferometric sonars) versus active optical (ALB) sensors, ALB bottom detection, and seafloor characterization using HSI and ALB. |
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