Helicopter position and attitude during laser scanner flights of the MOSAiC expedition, version 1

DOI

Helicopter position (latitude, longitude, altitude) and attitude (pitch, roll, true heading) were measured by an inertial measurement unit (IMU-57) as part of the combined global navigation satellite system (GNSS) and inertial navigation system (INS) Applanix AP60-Air (hdl:10013/sensor.a9fee346-91e7-4eed-9f2f-89f1368e53a0). The IMU received input signal from two AV39 GNSS antennae installed on the forward and aft cowlings on top of the main cabin of the helicopter. The IMU was mounted in the rear cargo compartment on a sensor plate together with the airborne laser scanner and the sensor plate was connected with dampeners to the helicopter airframe.The helicopter flights in this data set include surveys where the airborne laser scanner was operated along the MOSAiC drift from the north of the Laptev Sea, across the central Arctic Ocean, and towards the Fram Strait from September 2019 to October 2020. They are both small scale, ~5x5 km grid patterns mainly over the central observatory, and large scale, few tens of km away from RV Polarstern, triangle pattern, or transect flights. The position and attitude data were collected to aid the processing of data from the instruments onboard like the airborne laser scanner (Jutila et al., 2022; doi:10.1594/PANGAEA.950509), the infrared camera (Thielke et al., 2022; doi:10.1594/PANGAEA.941017), and the RGB camera (Neckel et al., 2022; doi:10.1594/PANGAEA.949433). The GPS/INS data was post-processed using Applanix software POSPac Mobile Mapping Suite (MMS) 8.3 and resulted in the 200 Hz precise point positioning (PPP) solution. The post-processed positions correspond to the location of the IMU in the aircraft reference frame in the cargo compartment of the helicopter. For a set of high latitude flights, the post-processing failed due to the low signal-to-noise of the horizontal component of the Earth's rotation rate. In this case only the 10 Hz real time navigation (RTNav) solution is provided. The positioning and altitude error for the real time can be metres, while the post-processed 200 Hz solution has an accuracy of decimetres. The challenging nature of GNSS (limited satellite visibility, ionospheric interference) and inertial navigation means that the quality of the INS/GPS is degraded even after post-processing compared to lower latitude data.

Identifier
DOI https://doi.org/10.1594/PANGAEA.950278
Related Identifier References https://doi.org/10.1038/s41597-023-02565-6
Related Identifier References https://doi.org/10.1594/PANGAEA.950509
Related Identifier References https://doi.org/10.1038/s41597-023-02318-5
Related Identifier References https://doi.org/10.1594/PANGAEA.949433
Related Identifier References https://doi.org/10.1594/PANGAEA.941017
Related Identifier References https://doi.org/10.1038/s41597-022-01461-9
Related Identifier IsDocumentedBy https://doi.org/10.1525/elementa.2021.000046
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.950278
Provenance
Creator Hendricks, Stefan ORCID logo; Jutila, Arttu ORCID logo; Birnbaum, Gerit ORCID logo; von Albedyll, Luisa ORCID logo; Ricker, Robert ORCID logo; Hutter, Nils ORCID logo; Haas, Christian ORCID logo
Publisher PANGAEA
Publication Year 2022
Funding Reference Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven https://doi.org/10.13039/501100003207 Crossref Funder ID AFMOSAiC-1_00 Multidisciplinary drifting Observatory for the Study of Arctic Climate; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven https://doi.org/10.13039/501100003207 Crossref Funder ID AWI_PS122_00 Multidisciplinary drifting Observatory for the Study of Arctic Climate / MOSAiC; Federal Ministry of Education and Research https://doi.org/10.13039/501100002347 Crossref Funder ID 03F0866A https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0866A MOSAiC 1 - IceSense: Fernerkundung der saisonalen Entwicklung klimarelevanter Meereis-Eigenschaften; Leitantrag; Vorhaben: Saisonale Veränderungen von Eisdicken und Schmelztümpeln
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 134 data points
Discipline Earth System Research
Spatial Coverage (-35.607W, 78.356S, 135.185E, 89.140N); Arctic Ocean
Temporal Coverage Begin 2019-09-28T03:49:41Z
Temporal Coverage End 2020-09-28T12:15:43Z