Version 1
: Received: 9 August 2024 / Approved: 9 August 2024 / Online: 12 August 2024 (11:25:32 CEST)
How to cite:
O’Kane, S.; McCarthy, T.; Fealy, R.; Kratzer, S. Validation of OLCI Sentinel-3 water products in the Baltic Sea and evaluating the effect of System Vicarious Calibration (SVC). Preprints2024, 2024080734. https://doi.org/10.20944/preprints202408.0734.v1
O’Kane, S.; McCarthy, T.; Fealy, R.; Kratzer, S. Validation of OLCI Sentinel-3 water products in the Baltic Sea and evaluating the effect of System Vicarious Calibration (SVC). Preprints 2024, 2024080734. https://doi.org/10.20944/preprints202408.0734.v1
O’Kane, S.; McCarthy, T.; Fealy, R.; Kratzer, S. Validation of OLCI Sentinel-3 water products in the Baltic Sea and evaluating the effect of System Vicarious Calibration (SVC). Preprints2024, 2024080734. https://doi.org/10.20944/preprints202408.0734.v1
APA Style
O’Kane, S., McCarthy, T., Fealy, R., & Kratzer, S. (2024). Validation of OLCI Sentinel-3 water products in the Baltic Sea and evaluating the effect of System Vicarious Calibration (SVC). Preprints. https://doi.org/10.20944/preprints202408.0734.v1
Chicago/Turabian Style
O’Kane, S., Rowan Fealy and Susanne Kratzer. 2024 "Validation of OLCI Sentinel-3 water products in the Baltic Sea and evaluating the effect of System Vicarious Calibration (SVC)" Preprints. https://doi.org/10.20944/preprints202408.0734.v1
Abstract
The monitoring of coastal waters using satellite data, from sensors including Sentinel-3 OLCI, has become a vital tool in the management of these water environments; especially when it comes to improving our understanding of the effects of climate change on these regions. In this study, Level-2 water products derived from different OLCI Sentinel-3 processors were validated against a comprehensive in situ dataset from the NW Baltic Sea proper region. The products validated were those of the regionally adapted Case-2 Regional Coast Colour (C2RCC) OLCI processor (v1.0 and v2.1), as well as the latest standard Level-2 OLCI case 2 (Neural Network) products from Sentinel-3’s processing baseline: Baseline Collection 003 (BC003), including “CHL_NN”, “TSM_NN”, and “ADG443_NN”. Furthermore, the effect of the current EUMETSAT system vicarious calibration (SVC) on the Level-2 water products was also validated. Results showed that the system vicarious calibration (SVC) reduces the reliability of the Level-2 OLCI products. For example, the application of these SVC gains to the OLCI data for the regionally adapted v2.1 C2RCC products resulted in RMSD increases of 36% for “conc_tsm”; 118% for “conc_chl”; 33% for “iop_agelb”; 50% for “iop_adg”; and 10% for “kd_z90max” using a ±3h validation window. The findings indicate that the current EUMETSAT SVC gains should be applied and interpreted with caution in the region of study at present. A key outcome of the paper recommends the development of a regionally specific SVC against AERONET-OC data for the region.
Keywords
OLCI; Sentinel-3; C2RCC; System Vicarious Calibration (SVC); Baltic Sea; Coloured Dissolved Organic Matter (CDOM); Chlorophyll-a; Total Suspended Matter (TSM)
Subject
Environmental and Earth Sciences, Remote Sensing
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
