gps(1m)

NAME
gps - Compare position from different navigation devices

USAGE
gps

DESCRIPTION
This Matlab script reads navigation data from two different files, assuming that these result from two different navigation devices. Typically, this could be the navigation positions stored in a CODAS database, and an external GPS device. Input files must have the following columns: Time in decimal days Longitude in degrees Latitude in degrees This script is quite crude and could be improved easily.

PARAMETERS
The following parameters must be edited:

year_base
    Base year used in input files.

nav_file
    Name of first navigation file.

gps_file
    Name of second GPS data file.

avg_time
    Ensemble average time in seconds. This parameter is used to find common positions and gaps between both input files.

plot_title
    Title for plot.

note
    Additionnal string to print on the plot.

FILES
gps.ps

AUTHORS
Pierre Jaccard, Geophysical Institute, University of Bergen, 1999