1 = UTC of Position 2 = Latitude (degrees decimal minutes) 3 = N or S 4 = Longitude (degrees decimal minutes) 5 = E or W 6 = GPS quality indicator (0=invalid; 1=GPS fix; 2=Diff. GPS fix) 7 = Number of satellites in use [not those in view] 8 = Horizontal dilution of position 9 = Antenna altitude above/below mean sea level (geoid) 10 = Meters (Antenna height unit) 11 = Geoidal separation (Diff. between WGS-84 earth ellipsoid and mean sea level. -=geoid is below WGS-84 ellipsoid) 12 = Meters (Units of geoidal separation) 13 = Age in seconds since last update from diff. reference station 14 = Diff. reference station ID# 15 = ChecksumFor the GPVTG strings:
VTG=actual track made good and speed over ground $GPVTG,t,T,m,M,s.ss,N,s.ss,K*hh 1=True course made good over ground, degrees 2=Fixed text 'T' indicates that track made good is relative to true north 3=Magnetic course made good over ground, degrees 4= Fixed text 'M' indicates that track made good is relative to magnetic north 5=Speed over ground in knots 6=Fixed text 'N' indicates that speed over ground in knots 7=Speed over ground in kilometers/hour 8=Fixed text 'K' indicates that speed over ground is in kilometers/hour 9=Checksum.
The purpose of these data is to provide the navigation for OSV Bold cruise 2010-015-FA as recorded from an Ashtech G12 Global Positioning System (GPS) Sensor. This provides an archive of the original navigation as well as allowing others to reprocess the navigation for their purposes.
Are there legal restrictions on access or use of the data?
Use_Constraints:The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Neither the U.S. government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
|Data format:||This WinZip file contains the ASCII text navigation files as well as the associated metadata files. in format TEXT Size: 3.2|
|Media you can order:||DVD-ROM (Density 4.7 Gbytes) (format UDF)|
The user must have software capable of uncompressing the WinZip file.