The DGPS horizontal positional accuracy is estimated to be within 3-5 m and the accuracy of RTK-GPS is estimated to be less than 1 m.
Positioning data from all these sensors were logged using HYPACK navigation software version 12.0.8.12 (These data were incorporated into the geophysical data during acquisition and logged to these HYPACK files in the event that post-processing the horizontal and vertical positional information was necessary.
Real-Time Kinematic Global Positioning System (RTK-GPS) and Differential GPS (DGPS) navigation data were collected during survey 2012-024-FA using the Coda F180 RTK-GPS, Novatel DL-V3 RTK-GPS and the Hemisphere DGPS. The EC1 messages (DEV1) represents "dummy" data and should not be used. In the header of each HYPACK file, DEV3 is erroneously labeled as "F190" however the system used was really the Coda F180 RTK-GPS. How reliable are the data what problems remain in the data set? Person who carried out this What similar or related data should the user be aware of?
Times are recorded in UTC (Coordinate Universal Time). For example, filename 015_1239.260 represents planned survey HYPACK line number 015, start time 1239 and Julian Day 260. The filenames are in the format of linenumber_starttime.julianday. Raw HYPACK navigation files were transferred from the navigation acquisition computer to a centralized data server on the survey vessel for accessibility and archival.