de.pangaea.dataset995225 und dataset PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact 2026-08-11T09:33:53Z https://doi.pangaea.de/10.1594/PANGAEA.995225 <gco:CharacterString>Visual images of the surface taken by a camera installed on RV POLARSTERN during expedition PS149 (July - September 2025, CONTRASTS)</gco:CharacterString> 2026-06-17T11:28:26 publication https://doi.org/10.1594/PANGAEA.995225 Bühler, Linnu
l.buehler@uni-koeln.de
author Rückert, Janna Elisabeth
janna.rueckert@uni-bremen.de
https://orcid.org/0000-0001-9885-6576 information author Walbröl, Andreas
a.walbroel@uni-koeln.de
https://orcid.org/0000-0003-2603-2724 information author Krobot, Pavel
pkrobot@uni-koeln.de
author PANGAEA
info@pangaea.de
https://www.pangaea.de/ information publisher tableDigital During the Polarstern cruise PS149 from July 2025 to September 2025 in the Arctic Ocean, photos of the surface (open ocean and sea ice) were recorded from onboard the vessel with a down-looking camera (GoPro Hero 11 Black) that was installed on port side on the A-deck (at around 20 m above sea level). The viewing angle (off-nadir) was around 53°. Each image has a size of 1114 x 974 pixels. The camera was operated with a sampling rate of 0.5 Hz, taking a picture every 2 s. The visual camera was operated in conjunction with an infrared camera, pointing at the same target, in addition microwave radiometers measured the surface brightness temperatures of a small area within the camera image (these datasets are also part of the VAMPIRE-2 dataset bibliography https://doi.org/10.1594/PANGAEA.990497). The images are downscaled to reduce storage needs and stored as zipped JPG files where one zip file includes one image per minute from one hour. In addition, the images are projected to the ground (top view projection). For that, the ship railing visible in the lower right of each image is masked out, except for a 40 by 40 pixel area showing the white ship hull. This area may be taken as white reference (calibration target) by users who want to use, for example, calibrated brightness information. The projection to the ground uses the roll and tilt angles obtained from the hydrins measurements (available via dship at 1 Hz resolution) and the python package cameratransform with the following parameters: sensor size 6.47mm x 5.05mm and focallength_mm 3.8 mm. Finally the images are cropped to contain a smaller area in the center of the original image. These post-processed images are available in the original temporal resolution. Data is available starting 3 July, 11:06, until 28 August, 13:44. More than 1 hour of data is missing from 2025-07-03 15:17:26 to 2025-07-04 17:42:43, and from 2025-07-14 09:02:58 to 2025-07-15 08:43:10. completed Bühler, Linnu
l.buehler@uni-koeln.de
principalInvestigator Arctic Arctic Ocean Camera observations RGB Sea ice theme <gco:CharacterString>PANGAEA Keyword List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact AC3 Arctic Amplification theme <gco:CharacterString>PANGAEA Project List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation -10.085402 14.923443 78.25511 81.889001 2025-07-03T11:00:00 2025-08-28T13:00:00 DATE/TIME thematicClassification Image thematicClassification Digital Camera, GoPro; top view projection, zipped tiff files Image (File Size) physicalMeasurement Digital Camera, GoPro; top view projection, zipped tiff files Bytes Bytes Image thematicClassification Digital Camera, GoPro; one image per minute from one hour, zipped JPG files Image (File Size) physicalMeasurement Digital Camera, GoPro; one image per minute from one hour, zipped JPG files Bytes Bytes text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.995225?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: PS149_0_Underway-16-gopro_uoc-01 * LATITUDE START: 78.255110 * LONGITUDE START: 14.923443 * LATITUDE END: 81.889001 * LONGITUDE END: -10.085402 * DATE/TIME START: 2025-07-04T17:44:00 * DATE/TIME END: 2025-08-28T13:42:00 * O2A REGISTRY URI: https://registry.o2a-data.de/items/11620 * CAMPAIGN: PS149 * BASIS: Polarstern * METHOD/DEVICE: Digital Camera, GoPro Not logged in DShip. Time Lapse, 0.5 Hz 2025-07-04T17:44:00 Related to <gco:CharacterString>Water vapor, mixed-phase clouds, precipitation and sea ice emissivity over the Central Arctic Ocean (VAMPIRE-2): remote sensing and in-situ measurements suite during POLARSTERN cruise PS149 (CONTRASTS)</gco:CharacterString> 2026-01-01 publication https://doi.org/10.1594/PANGAEA.990497 Bühler, Linnu
l.buehler@uni-koeln.de
author Rückert, Janna Elisabeth
janna.rueckert@uni-bremen.de
https://orcid.org/0000-0001-9885-6576 information author Walbröl, Andreas
a.walbroel@uni-koeln.de
https://orcid.org/0000-0003-2603-2724 information author Mech, Mario
mario.mech@uni-koeln.de
https://orcid.org/0000-0001-6229-9616 information author Krobot, Pavel
pkrobot@uni-koeln.de
author Ebell, Kerstin
kebell@meteo.uni-koeln.de
https://orcid.org/0000-0002-0042-4968 information author Schnitt, Sabrina
s.schnitt@uni-koeln.de
https://orcid.org/0000-0002-3949-770X information author Spreen, Gunnar
gunnar.spreen@uni-bremen.de
https://orcid.org/0000-0003-0165-8448 information author documentDigital Related to <gco:CharacterString>Master track of POLARSTERN cruise PS149 in 1 sec resolution (zipped, 221 MB)</gco:CharacterString> 2025-01-01 publication https://doi.org/10.1594/PANGAEA.987132 Nicolaus, Marcel
marcel.nicolaus@awi.de
https://orcid.org/0000-0003-0903-1746 information author documentDigital Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven