National CORS ID

CORS DATA and Related Information
CORS Global Navigation Satellite System (GNSS - GPS and GLONASS) Data are kept online from our first day of Feb. 9, 1994 with the one site "NIST" in Gaithersburg, MD, to present.  Required station data and information files can be found by highlighting the desired elements below and then clicking on the Find Files button.  We have developed a User Friendly Cors Page to join days, get partial days, interpolate or decimate the data.

The data are compressed using the gnu zip (gzip) utility. If you have trouble uncompressing these files go to the CORS home page and click on Utilities.  To see if there were any problems on your requested observing day, select Data Availability.  Also, a daily global broadcast ephemeris file is available for sites with no navigation file.

Please choose SITE, OPTION (and if necessary) DATE

sort by state or country code - sort by city - sort by site ID
SITE (sorted by state)OPTIONYEAR
Month*
Day*
or
Enter Day of Year (e.g. 2, 93, 365 )*
This will override the Month and Day boxes if selected!           

Do not be confused by the times listed to the right of the next page.  They are the times the files were posted.  The 8th character in the file name indicates the data range: "a" 0:00 UT - 0:59 UT , "b" 1:00 UT - 1:59 UT, ..., "x" 23:00 UT - 23:59 UT.  The files with 24 hours worth of data have a 0 (zero) in the 8th place.

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

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anim National Geodetic Survey - CORS Group
Last modified: August 25, 2008
http://www.ngs.noaa.gov/CORS/Data.html