GPS Data Files have the following name convention:

           RINEX file naming convention is: ssssdoyh.yyt.gz

     ssss -- station four-character identifier FOR NJIT it is nji2
     doy -- day of year
     h -- hour code ('a'=0000 to 0100; 'x'=2300-2400)
     yy -- two digit year (e.g. 01)
     t -- file type ( 'o'-observation, 'n' -navigation, 'm' - meteorological or 's' - summary)
     gz -- designates file is compressed using the GZIP program

EXAMPLE

 This example will show how to find the filename for June 27, 2001 at 9:15 AM EDT.

How to compute the day of the year (DOY)

Example: The DOY for June 27 is:  151 + 27 = 178
              (# for June is 151 plus the 27th of the month equals 178)
 

****REMEMBER:  From March on in leap years, add 1 more day to the numbers in the chart above.****

Time of the day (hour)  or the hour code:
 

Hour	Code		Hour	Code		Hour	Code		Hour	Code
0-1	a		6-7	g		12-13	m		18-19	s
1-2	b		7-8	h		13-14	n		19-20	t
2-3	c		8-9	i		14-15	o		20-21	u
3-4	d		9-10	j		15-16	p		21-22	v
4-5	e		10-11	k		16-17	q		22-23	w
5-6	f		11-12	l		17-18	r		23-24	x

                        Notes: Times are relative to Greenwich (+5 EST or +4 EDT)

Example:

Observation Data for 9:15am on June 27, 2001 for station NJIT (nji2) is stored in file nji2178n.01o.gz

    Note: 9:15am in NJ is 1:15 in Greenwich, Code "n" 1-2 pm
 

 

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