Raw data acquired by position sensors on board RV Alkor during expedition AL628 were processed to receive a validated master track which can be used as reference of further expedition data. During AL628 data from the motion reference unit Kongsberg MRU-Z, the Trimble MPS865 GPS receiver, the Furuno GP-170 and Furuno GP-150 GPS receivers and from the NAVIGAT X MK 1 gyro compass were used to calculate the mastertrack. Data were downloaded from DAVIS SHIP data base (http://dship.bsh.de) with a resolution of 1 sec. Processing and evaluation of the data is outlined in the data processing report. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track.

Due to sensitive information, this dataset is only available on request. Please contact the chief scientist Jens Greinert directly via email: jgreinert@geomar.de