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Arctic Cloud Summer Expedition (ACSE): high resolution ship motion data from the University of Leeds XSENS MTi-G-700 attitude and heading reference system on board Icebreaker Oden

Update Frequency: Not Planned
Latest Data Update: 2018-03-21
Status: Final
Online Status: ONLINE
Publication State: Citable
Publication Date: 2018-04-14
Download Stats: last 12 months
Dataset Size: 1.87K Files | 15GB


This dataset contains high resolution attitude and motion measurements of the Icebreaker Oden ship's motion by the University of Leeds' XSENS MTi-G-700 attitude and heading reference system during the Arctic Cloud Summer Expedition (ACSE). The ACSE cruise took place in the Arctic during summer 2014. These data were obtained to complement a suite of other observations taken during the cruise. Those of the UK contribution, as well as selected other data, are available within the associated data collection in the Centre for Environmental Data Analysis (CEDA) archives. Other cruise data may be available in the NOAA ACSE and The Bolin Centre for Climate Research SWERUS (Swedish-Russian-US Investigation) holdings - see online resources linked to this record.

Measurements were made at 40Hz for inertial measurements and 4Hz for GPS measurements. Though the inertial measurements were used at 20Hz when merged with sonic anemometer, 20 minute final fluxes (see related data within the parent data collection).

The XSens MTi-G-700 measures 3-axis accelerations, rotation rates, and magnetic field components as well as GPS position. Internal algorithm calculate 3-axis velocity, tilt angles and heading. However, users of these data should note that it is often not possible to calibrate magnetic field for local platform induced distortions (soft iron and hard iron corrections) resulting in errors in magnetic field and calculated outputs. Additionally, the heading measurements were found to unreliable on the ship.

The Arctic Cloud Summer Expedition (ACSE) was a collaboration between the University of Leeds, the University of Stockholm, and NOAA-CIRES. ACSE aimed to study the response of Arctic boundary layer cloud to changes in surface conditions in the Arctic Ocean as a working package of the larger Swedish-Russian-US Investigation of Climate, Cryosphere and Carbon interaction (SWERUS-C3) Expedition in Summer 2014. This expedition was a core component to the overall SWERUS-C3 programme and was supported by the Swedish Polar Research Secretariat.

ACSE took place during a 3-month cruise of the Swedish Icebreaker Oden from Tromso, Norway to Barrow, Alaska and back over the summer of 2014. During this cruise ACSE scientists measured surface turbulent exchange, boundary layer structure, and cloud properties. Many of the measurements used remote sensing approaches - radar, lidar, and microwave radiometers - to retrieve vertical profiles of the dynamic and microphysical properties of the lower atmosphere and cloud.

The UK participation of ACSE was funded by the Natural Environment Research Council (NERC, grant: NE/K011820/1) and involved instrumentation from the Atmospheric Measurement Facility of the UK's National Centre for Atmospheric Science (NCAS AMF).

Citable as:  Brooks, I.M.; Prytherch, J. (2018): Arctic Cloud Summer Expedition (ACSE): high resolution ship motion data from the University of Leeds XSENS MTi-G-700 attitude and heading reference system on board Icebreaker Oden. Centre for Environmental Data Analysis, date of citation. doi:10.5285/f2f4675203d04e4eb269e230633d03db.
Abbreviation: Not defined
Keywords: platform motion, turbulent velocity correction


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were collected, quality controlled and prepared for archiving by the instrument scientists before upload to the Centre for Environmental Data Analysis (CEDA) for long term archiving.

Data Quality:
Data quality were checked by the ACSE project data author before supplying to CEDA. Further information on quality may be available in related documentation.
File Format:
Data are CF-compliant netCDF formatted.

Related Documents

No documents related to this record were found.

Process overview

This dataset was generated by instruments deployed on platforms as listed below.
Output Description


  • units: degrees
  • long_name: pitch angle (+ve bow down)(degrees)
  • var_id: pitch
  • units: m/s
  • var_id: W
  • long_name: platform velocity w-component (+ve up) (m/s)
  • units: m/s
  • var_id: U
  • long_name: platform velocity x-component (+ve to east) (m/s)
  • units: m/s
  • var_id: V
  • long_name: platform velocity y-component (+ve to north) (m/s)
  • units: degrees
  • long_name: roll angle (+ve port up)(degrees)
  • var_id: roll
  • var_id: time
  • units: days
  • long_name: time as decimal day of year
  • var_id: doy
  • units: degrees
  • long_name: yaw angle (= 90 - heading)(+ve anticlockwise) (degrees)
  • var_id: yaw

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