| Real-Time Networks 101 | Gavin Schrock, LS, authored this 15-part series of articles and videos that appeared in American Surveyor Magazine between 2006 and 2008. | link video | |||
| FCC Narrowband Mandate | The FCC is mandating changes in the narrowband spectrum by January 1, 2013. Click on the link for detailed information. link | link | |||
| ORGN | Oregon Real Time GPS Network | link | |||
| WSRN | Washington State Reference Network | link | |||
| OPUS | Online Positioning User Service. The quick and easy way to post process dual frequency GPS data | link | |||
| NGS State Plane Coordinate Toolkit | Convert your State Plane Coordinates to Geodetic, or vise verse. You can also locate a state plane zone, by country or position | link | |||
| NGS GPS Antenna Calibration | Doing post processing? This link has a list of GPS antenna details and measurements. | link | |||
| Trimble Support | Locate documentation and the latest firmware/software release | link | |||
| CORS | Continuously Operating Reference Stations | link | |||
| Omnistar | Wide-area differential GPS service, using satellite broadcast techniques | link | |||