Guidelines for Establishing and Operating CORS
NOAA's National Geodetic Survey (NGS) invites organizations and individuals to share data from their permanent GPS base stations by including these stations in the National CORS network. Each CORS must meet the specifications described in the
CORS Guidelines (pdf) - Jan 2013
Joining the Continuously Operating Reference Station (CORS) Network
Key Requirements
- Receiver/Antenna is at least dual frequency (L1 and L2)
- Receiver tracks at least ten satellites above 0 degrees
- Receiver provides L1 C/A-code pseudorange or P-code pseudorange
- Receiver provides L1 and L2 full wavelength carrier phase
- Receiver and Antenna models must use international codes
- Antenna and monument must be coupled by an orienting/leveling device
- Antenna oriented to TRUE north (Calculate Magnetic Declination)
- Antenna has NGS phase center variability model available (http://www.ngs.noaa.gov/ANTCAL)
- Equipment metadata including photographs and station log must be provided
- Photos (Description) (Sample)
- Logs (Blank Log) (Log Instructions) (Log Checker)
- Data are freely available for distribution
- Data are recorded on a 30-second or shorter interval
- Provider has on-site Internet access
- Provider maintains all equipment
- Provider agrees to adopt positional coordinates sanctioned by NGS
