|
|
|
|
| |
|
|
| Tilstone, Gavin; Dall’olmo, Giorgio; Hieronymi, Martin; Ruddick, Kevin; Beck, Matthew; Ligi, Martin; Costa, Maycira; D’alimonte, Davide; Vellucci, Vincenzo; Vansteenwegen, Dieter; Bracher, Astrid; Wiegmann, Sonja; Kuusk, Joel; Vabson, Viktor; Ansko, Ilmar; Vendt, Riho; Donlon, Craig; Casal, Tânia. |
| A field intercomparison was conducted at the Acqua Alta Oceanographic Tower (AAOT) in the northern Adriatic Sea, from 9 to 19 July 2018 to assess differences in the accuracy of in- and above-water radiometer measurements used for the validation of ocean colour products. Ten measurement systems were compared. Prior to the intercomparison, the absolute radiometric calibration of all sensors was carried out using the same standards and methods at the same reference laboratory. Measurements were performed under clear sky conditions, relatively low sun zenith angles, moderately low sea state and on the same deployment platform and frame (except in-water systems). The weighted average of five above-water measurements was used as baseline reference for... |
| Tipo: Text |
Palavras-chave: Fiducial reference measurements; Remote sensing reflectance; Ocean colour radiometers; TriOS RAMSES; Seabird HyperSAS; Field intercomparison; AERONET-OC; Acqua Alta Oceanographic Tower. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00629/74135/73599.pdf |
| |
|
|
| Leymarie, Edouard; Penkerc'H, Christophe; Vellucci, Vincenzo; Lerebourg, Christophe; Antoine, David; Boss, Emmanuel; Lewis, Marion R.; D'Ortenzio, Fabrizio; Claustre, Herve. |
| An efficient system to produce in situ high quality radiometric measurements is compulsory to rigorously perform the vicarious calibration of satellite sensors dedicated to Ocean Color Radiometry (OCR) and to validate their derived products. This requirement is especially needed during the early stages of an OCR satellite activity or for remote areas poorly covered by oceanographic cruises with possible bio-optical anomalies. Taking advantage of Argo's profiling float technology, we present a new autonomous profiling float dedicated to in situ radiometric measurements. The float is based on the Provor CTS5 (manufacturer NKE) with an added novel two protruding arm design allowing for sensor redundancies, shading mitigation and near-surface data. Equipped... |
| Tipo: Text |
Palavras-chave: Autonomous profiling floats; Remote sensing reflectance; Ocean color; Validation; System vicarious calibration; Austral ocean; Mediterranean Sea; Radiometric measurement. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00585/69694/67579.pdf |
| |
|
|
|
