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| Titel |
In situ determination of the remote sensing reflectance: an inter-comparison |
| VerfasserIn |
G. Zibordi, K. Ruddick, I. Ansko, G. Moore, S. Kratzer, J. Icely, A. Reinart |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 8, no. 4 ; Nr. 8, no. 4 (2012-08-06), S.567-586 |
| Datensatznummer |
250005751
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| Publikation (Nr.) |
 copernicus.org/os-8-567-2012.pdf |
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| Zusammenfassung |
| Inter-comparison of data products from simultaneous
measurements performed with independent systems and methods is a viable
approach to assess the consistency of data and additionally to investigate
uncertainties. Within such a context the inter-comparison called Assessment of In Situ Radiometric Capabilities for Coastal Water Remote Sensing Applications (ARC)
was carried out at the Acqua Alta Oceanographic Tower in the northern
Adriatic Sea to explore the accuracy of in situ data products from various in- and
above-water optical systems and methods. Measurements were performed under
almost ideal conditions, including a stable deployment platform, clear sky,
relatively low sun zenith angles and moderately low sea state. Additionally,
all optical sensors involved in the experiment were inter-calibrated through
absolute radiometric calibration performed with the same standards and
methods. Inter-compared data products include spectral water-leaving
radiance Lw (λ), above-water downward irradiance
Ed(0+,λ) and remote sensing reflectance
Rrs(λ). Data products from the various measurement
systems/methods were directly compared to those from a single reference
system/method. Results for Rrs(λ) indicate spectrally averaged
values of relative differences comprised between −1 and +6%, while
spectrally averaged values of absolute differences vary from approximately
6% for the above-water systems/methods to 9% for buoy-based
systems/methods. The agreement between Rrs(λ) spectral relative
differences and estimates of combined uncertainties of the inter-compared
systems/methods is noteworthy. |
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