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Global Positioning System> CBS Files for Download

CBS Files

Graphic image of the USDA Forest Service shield logo.International Institute of Tropical Forestry
GPS Base Station
US Forest Service

CBS Year Month Date (from) Date (to)

Note: If your query yields a blank page check the above form for correct data entry. If it is still blank then there is no data available for the requested times or there is a problem with the search.

Alternatively, click below for a full listing of all reference files available from this website for this CBS.

Display all files available at International Institute of Tropical Forestry


  • Latitude: 18 23' 21.64654" North
  • Longitude: 66 3' 18.98934" West
  • Horizontal Datum: NAD83 Rev.97
  • Elevation: 2.848 meters above ellipsoid
  • Receiver: 12 Channel TRIMBLE Pro XR Everest receiver with compact L1 antenna with ground plane
  • Tracking epoch (sec.): Position at 5 seconds; SYNC measure at 5 seconds
  • Station Operation: Operation is 16 hours per day, 0600-2200 local time, 7 days per week. File transfer is 6 minutes after the hour.



  • Data is available in receiver dependent Trimble *.SSF format RINEX is not supported at this time.
  • Data can be downloaded via Internet.
  • File name: AYMMDDHH.EXE where A=IITF Base; Y=year; MM=month; DD=day; HH=hour in GPS time; .EXE files are compressed and self-extracting. File length is one hour.
  • Data is kept 12 month before being removed from data storage.

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