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Gidudu, Anthony; Garaba, Shungudzemwoyo Pascal; Letaru, Lydia; Natuwera, Prince; Semyalo, Ronald; Kulabako, Robinah; Amulen, Justine; Okello, William (2022): Hyperspectral above-water radiometric quantities observed during cruise aboard RV IBIS on Lake Victoria, Uganda, from 13 to 15 October 2021 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.947714

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Published: 2022-08-30 • DOI registered: 2022-10-14

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Abstract:
Hyperspectral radiometric quantities were observed at a 5-minute sampling interval in the Ugandan portion of Lake Victoria during a scientific field campaign aboard research vessel (RV) IBIS from 13 to 15 October 2021. The three-day fieldwork was coordinated starting from the Napoleon Bay, Jinja, Uganda. A radiometer setup with one TriOS RAMSES-ACC hyperspectral cosine irradiance meter to measure incoming solar irradiance and two TriOS RAMSES-ARC hyperspectral radiance meters to measure total upward sea surface leaving radiance (Lsfc) at 45° nadir and sky-leaving radiance (Lsky) at 45° zenith angle, was installed using a custom-made frame at the bow of RV IBIS. Data logging of raw and calibrated radiometric quantities was automated using TriOS MSDA XE version 8.9.2 software. Further processing was done using Mathworks Matlab 2016a and R software. Processed data was interpolated to 1 nm spectral resolution using PCHIP function in Matlab between 320 and 950 nm. Only the data with valid GPS coordinates and with spectra contributing less than 3% is included in this file, the rest of the data is available on request.
Funding:
German Research Foundation (DFG), grant/award no. 417276871: Exploring remote sensing of plastics in marine litter
Makerere University, grant/award no. RIF2/CEDAT/005: Harnessing Satellite Imagery to Improve the Monitoring of Floating Plastic Litter and Optical Water Quality of Lake Victoria, Uganda
Coverage:
Median Latitude: 0.131926 * Median Longitude: 33.169864 * South-bound Latitude: -0.128440 * West-bound Longitude: 32.921530 * North-bound Latitude: 0.413760 * East-bound Longitude: 33.278250
Date/Time Start: 2021-10-13T10:20:00 * Date/Time End: 2021-10-15T13:50:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
3 datasets

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Datasets listed in this bundled publication

  1. Gidudu, A; Garaba, SP; Letaru, L et al. (2022): Hyperspectral downward irradiance observed during cruise aboard RV IBIS on Lake Victoria, Uganda, from 13 to 15 October 2021. https://doi.org/10.1594/PANGAEA.947713
  2. Gidudu, A; Garaba, SP; Letaru, L et al. (2022): Hyperspectral total upward sea surface leaving radiance observed at 45° nadir angle observed during cruise aboard RV IBIS on Lake Victoria, Uganda, from 13 to 15 October 2021. https://doi.org/10.1594/PANGAEA.947708
  3. Gidudu, A; Garaba, SP; Letaru, L et al. (2022): Hyperspectral downward sky leaving radiance observed at 45° zenith angle during cruise aboard RV IBIS on Lake Victoria, Uganda, from 13 to 15 October 2021. https://doi.org/10.1594/PANGAEA.947711