Radiometric field inter-comparison of fiducial reference measurements using an open source community processor.

作者：G. Tilstone, Thomas Jordan, Dirk Aurin, Agnieszka Bialek, A. Déru, Ashley Ramsay, Martin Hieronymi, Giorgio Olmo, M. Ligi, C. Kovach, I. Ansko, M. Ondrusek, Viktor Vabson, G. Zibordi, juan ignacio gossn, Ewa Kwiatkowska, R. Vendt · 发表于：Optics Express · 年份：2025 · DOI：10.1364/oe.551042 · 被引用次数：2 · 研究领域：Medicine

A radiometric field intercomparison was conducted at the Acqua Alta Oceanographic Tower (AAOT) in the Adriatic Sea from 14 to 21 July 2022 to assess differences in the accuracy of above-water radiometer systems (Sea-Bird HyperSAS, pySAS, TriOS-RAMSES) processed using an open-source community processor (HyperCP). Class-based and sensor-specific characteristics of the radiometers were used to determine the quantities Ed(λ), Lsky(λ), Lt(λ) and Rrs(λ), and their associated uncertainties. Using sensor-specific characteristics, the differences among systems were 2% for Ed(λ), Lsky(λ), Lt(λ) and 2.5% for Rrs(λ) and the uncertainties were 1.5%, 2%, 1.5% and 5%, respectively. The differences were higher when using class-based characteristics. Lwn(λ) values were also compared to the above-water AERONET-OC SeaPRiSM and in-water HyperPro II. For SeaPRiSM, the differences and uncertainties were <5% over blue and green bands when using Mobley [App. Opt.38, 7442 (1999)10.1364/AO.38.007442] sea surface reflectance factors (ρ) and no NIR correction. For HyperPro II the differences were larger but were reduced when Rrs(λ) from the above-water systems was computed using ρ from Zhang et al. [Opt. Express25, A1 (2017)10.1364/OE.25.0000A1] with similarity (sim) spectrum (spec) NIR correction. HyperCP using sensor-specific characteristics is highly recommended to reduce the associated uncertainties and to produce the highest quality data for satellite OC validation.