The navigation data files are named following this convention: navYYYYDDDxxxx.txt. For example, the file name for R/V Point Lobos data collected on 3/10/98 would be nav1998069ptlo.txt.
The files are comma-delimited ASCII text files that can be easily imported in applications such as MS Excel and ArcView. The first line of the file provides a shortened name (a "header") for the data field. See the following table for a description of the fields.
Column |
Data |
Header |
Format* |
Example |
1 |
Year |
Year |
4d |
1998 (YYYY) |
2 |
Day of Year |
Day |
3d |
273 (DDD) |
3 |
UTC Time |
Time |
6d |
225245 (HHMMSS) |
4 |
Epoch Seconds |
Usec |
9d |
873759165 (seconds since 1/1/70) |
5 |
Latitude |
Lat |
10.6f |
36.783170 (decimal degrees) |
6 |
Longitude |
Lon |
11.6f |
-121.859258 (decimal degrees) |
7 |
Signal Quality |
Qual |
3.1f |
|
8 |
Differential Mode |
Mode |
1d |
1 |
Click here to display a sample ship navigation archive file.
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