#
#		GPS data header
# 	For GPS deployed on Drifter
# 	Deployment date 18 April 1995
#
# GPS  data records in this file contain 4 floating-point values and
# 3 integer values, as follows:
#
# time latitude longitude variance samples on_time status
#
# time:  GMT time.  Format is ddd.fffff, for julian day and fraction of day.
# latitude:  Latitude in degrees north (floating point)
# longitude:  Longitude in degrees west (floating point)
# variance:  Variance of position in meters (floating point)
# samples:  Number of samples taken to yield position and variance (integer)
# on_time: Total number of seconds GPS receiver was on.
#          This is normally (time to first fix) + (sample time)
# status:  Magellan receiver status word.  16 bit integer in hexadecimal.
#	   High byte:  0 = Sky Search, 1 = Searching, 2 = Gathering ephemeris
#		       3 = Getting 2D fixes, 4 = Getting 3D fixes,
#		       5 = Dead reckoning (2D), 6 = Dead reckoning (3D)
#		       7 = Insufficient sats up,
#		       8 = Not getting fixes (sats blocked)
#	   Low byte, flag bits, as follows:
#		0 - reserved, 1 - no fixes yet, 2 - receiving RTCM,
#		3 - using NVRAM setup, 4 - oscillator off frequency
#		5 - RAM checksum fail, 6 - NVRAM checksum fail, 7 - not used
#