Megacollect 2004: hyperspectral collection experiment over the waters of the Rochester Embayment

Raqueno, Rolando V.; Raqueño, Nina G.; Weidemann, Alan; Effler, Steven W.; Perkins, MaryGail; Vodacek, Anthony; Schott, John R.; Philpot, William; Kim, M.

doi:10.1117/12.605856

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…It also has a 3.3 nm spectral resolution with less than 0.5 nm accuracy. This has resulted in the widespread implementation of the TSRB as a reference detector for airborne and spaceborne measurements, such as in work completed by [Cullen et al, 1997;Kohler and Philpot, 2000;Raqueno et al, 2005;Dwivedi et al, 2008]. The TSRB has been used for validation of or as input into radiative transfer models [Chang et al, 2003;Louchard et al, 2003].…”

Section: Hypertsrbmentioning

confidence: 99%

Optical Detectors for Integration into a Low Cost Radiometric Device for In-Water Applications: HyDROW Performance Test at Loskop Dam

Chetty

Ramkilowan

Griffith

et al. 2013

European Journal of Remote Sensing

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South Africa's fresh water resources are under threat by Harmful Algal Blooms (HABs).A comprehensive and cost effective method for wide area detection and monitoring of HABs is therefore needed to manage and where possible circumvent the negative impact HABs may have on the country's aquatic ecosystems. Current commercial radiometers used for such applications are often too costly to purchase in numbers. This study focuses on the performance of a low cost, in-house developed prototype radiometer, Hyperspectral Device for Radiometric Observations in Water (HyDROW). HyDROW's performance has been evaluated against data registered with a commercially available Hyperspectral Tethered Spectral Radiometer Buoy (HyperTSRB) during a field campaign at Loskop Dam in South Africa. The Loskop Dam is at risk for HABs and has been selected given its diverse environments from an optical perspective. Measurements were made at five optically diverse test points. The maximum percentage difference between the HyperTSRB and HyDROW were ~8% in the blue, ~19% in the green and ~24% in the red bands of the spectrum. The correlation coefficients between the radiometers range from 0.97 at the most turbid of test sites, to better than 0.99 in clearer waters.

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Section: Hypertsrbmentioning

confidence: 99%

Optical Detectors for Integration into a Low Cost Radiometric Device for In-Water Applications: HyDROW Performance Test at Loskop Dam

Chetty

Ramkilowan

Griffith

et al. 2013

European Journal of Remote Sensing

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Megacollect 2004: hyperspectral collection experiment of terrestrial targets and backgrounds of the RIT Megascene and surrounding area (Rochester, New York)

et al. 2005

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This paper describes a collaborative collection campaign to spectrally image and measure a well characterized scene for hyperspectral algorithm development and validation/verification of scene simulation models (DIRSIG). The RIT Megascene, located in the northeast corner of Monroe County near Rochester, New York, has been modeled and characterized under the DIRSIG environment and has been simulated for various hyperspectral and multispectral systems (e.g., HYDICE, LANDSAT, etc.). Until recently, most of the electro-optical imagery of this area has been limited to very high altitude airborne or orbital platforms with low spatial resolutions. Megacollect 2004 addresses this shortcoming by bringing together, in June of 2004, a suite of airborne sensors to image this area in the VNIR, SWIR, MWIR, and LWIR regions. These include the COMPASS (hyperspectral VNIR,SWIR), SEBASS (hyperspectral LWIR), WASP (broadband VIS, SWIR, MWIR, LWIR) and MISI (hyperspectral VNIR, broadband SWIR, MWIR, LWIR). In conjunction with the airborne collections, an extensive ground truth measurement campaign was conducted to characterize atmospheric parameters, select targets, and backgrounds in the field. Laboratory measurements were also made on samples to confirm the field measurements. These spectral measurements spanned the visible and thermal region from 0.4 to 20 microns. These measurements will help identify imaging factors that affect algorithm robustness and areas of improvement in the physical modeling of scene/sensor phenomena. Reflectance panels have also been deployed as control targets to both quantify sensor characteristics and atmospheric effects. A subset of these targets have also been deployed as an independent test suite for target detection algorithms. Details of the planning, coordination, protocols, and execution of the campaign will be discussed with particular emphasis on the ground measurements. The system used to collect the metadata of ground truth measurements and disseminate this data will be described. Lastly, lessons learned in the field will be underscored to highlight additional measurements and changes in protocol to improve future collections of this area.

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Megacollect 2004: hyperspectral collection experiment over the waters of the Rochester Embayment

Cited by 2 publications

References 8 publications

Optical Detectors for Integration into a Low Cost Radiometric Device for In-Water Applications: HyDROW Performance Test at Loskop Dam

Optical Detectors for Integration into a Low Cost Radiometric Device for In-Water Applications: HyDROW Performance Test at Loskop Dam

Megacollect 2004: hyperspectral collection experiment of terrestrial targets and backgrounds of the RIT Megascene and surrounding area (Rochester, New York)

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