Five-minute average cruise track and ship velocity of the Antarctic Circumnavigation Expedition (ACE) undertaken during the austral summer of 2016/2017. ***** Dataset abstract ***** The ship's cruise track, velocity, course over ground and heading at one-minute resolution for all five legs of the Antarctic Circumnavigation Expedition (ACE) are derived from a combination of: - the latitude/longitude record of the Quality-checked, one-second cruise track for 21.12.2016 to 11.04.2017. - the latitude/longitude record of the Uncorrected inertial navigation dataset (one-second resolution) for 27.11.2016 to 21.12.2016 - the latitude/longitude record of the raw meteorological data (30-second resolution) until 27.11.2016 - where no latitude/longitude record at one-second resolution is available and the ship's velocity was above 2 meters per second, the three-second resolution record of the true and relative wind speed and direction, as well as the heading are used to re-calculate the ship's velocity under the assumption that the course of the ship equalled the heading. Basic filtering are applied to remove erroneous observations before the data are averaged to a one-minute resolution (DOI: 10.5281/zenodo.3752667). The one-minute time series are averaged to five-minute resolution, whereby the vector averaging is used for the platform velocity and orientation. For the latitude and longitude coordinates a simple average is calcualted, i.e., ignoring the curvature of the Earth. Short stretches of missing coordinates are filled with linear interpolation between neighbouring observations. ***** Original data collection ***** The intermediate processing steps and files which take us from the input datasets (10.5281/zenodo.3260616, 10.5281/zenodo.3719310, 10.5281/zenodo.3719359, 10.5281/zenodo.3369130) to this final set of output files can be seen in the dataset presented here. This dataset is a direct output of these intermediate processing steps. ***** Data processing ***** All steps to produce this quality-checked data file are fully described in Landwehr (2020; DOI: 10.5281/zenodo.3751686). ***** Quality checking ***** The data processing included basic methods of outlier detection based on the difference of the individual observations to the rolling median and the removal of implausible values (ship's location over land, instantaneous platform_speed_wrt_ground above 12 m/s). Outliers are removed prior to the time averaging. The column VELOCITY_SOURCE: indicates the source of the velocity estimates (1 = from 1/second filtered GPS coordinates; 3 = from 1/3second true and relative wind speed record; 30 = from 1/30second filtered GPS coordinates) The precission of the one-minute velocity estimates can be estimated from the precision of the GPS fix as PRECISION_velocity[m/s] = PRECISION_coordinates[m]/sqrt(Number of observations per minute)/60[s] Consequently, for VELOCITY_SOURCE==3 and VELOCITY_SOURCE==30, the precision of the estimates is slightly reduced compared to the record derived from the 1/second filtered GPS coordinates. The column COORDINATES_INTERPOLATED provides a flag that indicates if the latitude/longitude coordiantes are based on GPS fixes or a linear interpolation between neighbouring values (0 = based on measurements; 1 = interpolated value). ***** Standards ***** This dataset does not conform to any data formats or standards. ***** Further information for interpreting the data and using the dataset ***** Timescales: The ship responds to wave motion at a time scale of 1/11 seconds; this is not resolved in the one-minute average record. Navigation operations have time scales of several seconds to several minutes. Interpolation: of the coordinates should only be applied after further time averaging to at least five minutes. The velocity should only be interpolated over short stretches of time. Aggregation to lower temporal resolution: No problem but correct vector averaging should be done. ***** Dataset contents ***** - cruise-track-5min-legs0-4.csv, data file, comma-separated values - data_file_header, metadata, text format - README.txt, metadata, text format ***** Dataset contact ***** Sebastian Landwehr, Ecole Polytechnique Federale de Lausanne, Switzerland. ORCID: 0000-0003-2622-577X. Email: sebastian.landwehr@gmail.com ***** Dataset license ***** This five-minute averaged cruise track and velocity dataset is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full text can be found at https://creativecommons.org/licenses/by/4.0/ ***** Dataset citation ***** Please cite this dataset as: Landwehr, S., J. Thomas and J. Schmale. (2020). Five-minute average cruise track and ship velocity of the Antarctic Circumnavigation Expedition (ACE) undertaken during the austral summer of 2016/2017. (Version 1.0) [Data set]. Zenodo.