Raw GNSS/INS buoy data during the MOSAiC expedition 2019-2020
GB/NERC/BAS/PDC/01686
Abstract:
This dataset contains the raw data from GNSS/INS (Global Navigation Satellite System/Inertial Navigation System) buoys deployed during the 2019-2020 MOSAiC expedition. These buoys recorded the data from GNSS and Sensors. The raw GNSS data contain time, latitude, longitude, velocity, and fix type. The raw Sensors data contain time, acceleration, gyroscope, magnetometer, and temperature. These data were sampled at 10 Hz. The original data was in ANPP format (see advancednavigation.com), which have been converted to structured ASCII formats (such as RINEX, CSV) using Spatial Manager software. The buoys were assembled by the University of Huddersfield team and the deployment was done by the MOSAiC ice team throughout the expedition.
This work was funded by NERC MOSAiC program NE/S002545/1.
Citation:
Hwang, B., Hagan, B., & MOSAiC Ice Team. (2023). Raw GNSS/INS buoy data during the MOSAiC expedition 2019-2020 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/cd4f6322-fc3c-49e0-ab46-2c1a983e8e9e
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License
| Access: | No restrictions apply. |
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| Use: | Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
Basic Information
| Creation Date: | 2022-11-24 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
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| Parameters: |
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Additional Information
| Quality: | This is a raw dataset, and no data quality check was applied to the data. The data at the start and end of the files may contain unrealistic values due to the disturbances caused by battery exchanges. The GNSS fix for the raw data should be 2 (3D fix with no base station data). Any data with Fix = 1 or 0 should be discarded from the analysis. | |
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| Lineage/Methodology: | GNSS/INS buoy system was assembled by the University of Huddersfield. Each buoy system consists of a miniature inertial system (Spatial), a data storage (ILU), a GNSS antenna and a power supply. These sensor components were supplied from Advanced Navigation (advancednavigation.com) and Innovelec (innovelec.co.uk), and were then assembled in a weather-proof plastic case for deployment. A total of six sets of the GNSS/INS buoys were shipped to the expedition, but the number of the buoys deployed on the ice varied throughout the expedition due to the logistical and environmental circumstances. The deployment of the buoys was made in the vicinity (within 2 km) of RV Polarstern at the MOSAiC drifting site. The buoys recorded the data from GNSS and Sensors. The raw GNSS data contain time, latitude, longitude, velocity, and fix type. The raw Sensors data contain time, acceleration, gyroscope, magnetometer, and temperature. These data were sampled at 10 Hz. The original data was in ANPP format (see advancednavigation.com), which have been converted to structured ASCII formats (such as RINEX, CSV) using Spatial Manager software. |
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Extent
| Temporal Coverage: | |
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| Start Date | 2019-11-22 |
| End Date | 2020-09-14 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | 75 |
| Northernmost | 90 |
| Longitude | |
| Westernmost | -30 |
| Easternmost | 120 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Arctic |
| Detailed Location | Arctic Ocean |
Instrumentation
| Sensor(s): |
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| Data Collection: | Each GNSS sensor unit consists of Spatial, Data Interface Logging Unit (ILU), and antenna. Spatial is a rugged miniature GPS aided inertial navigation system and AHRS that provides accurate position, velocity, acceleration and orientation. It combines temperature calibrated accelerometers, gyroscopes, magnetometers and a pressure sensor with advanced GNSS receiver to deliver accurate and reliable navigation and orientation (see advancednavigation.com/solutions/spatial/). The position accuracy can be a few centimetres as long as the antenna has a good sky view without any obstructions. Data Interface Logging Unit (ILU) is a device server that interfaces to Spatial and provides data logging, a web interface, a time synchronisation server and different data input/output option. Two types of GNSS antennas were used: Antcom (G5ANT-53A4T1) and Tallysman (TW3972). |
Storage
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 215.4 GB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | The dataset is organised in five folders: Leg1, Leg2, Leg3, Leg4, and Leg5. These folders indicate the Legs of the MOSAiC expedition. For more information on the MOSAiC experiment, refer to the Special Feature in Elementa. Each folder contains quick plots of measured variables (in PNG format) and another folder containing raw GNSS data (in CSV format and RINEX format) and raw sensor data (in CSV format). The name of each data file folder is organised as follows - GNSSname_year-month-day_hour-minute-second (for example, SP1_19-11-22_04-26-18 - SP1: GNSS name, 19-11-22_04-26-18: 4:26 and 18 seconds on 22 November 2019). The file RawGNSS.csv contains the raw data from GNSS observations. The file RawSensors.csv contains the raw data from sensors. The file sptl* contains the raw GNSS data in ASCII RINEX format. |