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|Title:||Immersion Factors for the RAMSES Series of Hyper-Spectral Underwater Radiometers|
|Authors:||ZIBORDI GIUSEPPE; DARECKI Miroslaw|
|Citation:||JOURNAL OF OPTICS A - PURE AND APPLIED vol. 8 p. 252-258|
|Publisher:||IOP PUBLISHING LTD|
|Type:||Articles in periodicals and books|
|Abstract:||The immersion factors If of sample RAMSES radiance and irradiance hyper-spectral radiometers were experimentally determined in the 400-700 nm spectral range using state of the art protocols in view of supporting their use in accurate radiometric measurements for ocean color applications. Values of If obtained from the characterization of RAMSES-ACC-VIS irradiance units showed a dispersion of 2% in the blue increasing up to 4% in the red. Results obtained from the characterization of RAMSES-MRC-VIS radiance units having 20 degrees in-air full-angle field of view highlighted an average spectral bias of -2.4% in the theoretical If values determined with the sole use of the refractive indices of the medium and of the optical window. This average spectral bias exhibited values of -0.8% for the RAMSES-ARC-VIS radiometers having 7 degrees in-air full-angle-field of view. Using these results, reference If values have been proposed for the RAMSES series of radiometers.|
|JRC Institute:||Sustainable Resources|
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