OSGRS (Open Source GNSS Reference Server)

OSGRS is an Open Source project to develop the software and protocols for operating an Assisted-GNSS (A-GNSS) server connected to one or more reference stations. The protocol is known as GRIP (based on XML), and currently the server connects to a NovAtel OEM3 or OEM4 reference receiver.

The OSGRS provides "assistance" messages to user receivers able to make use of such messages to rapidly acquire weak GPS/GNSS signals. These receivers typically are found within mobilephones and similar devices.

• YAN, T., MUMFORD, P., DEMPSTER, A.G., RIZOS, C., HOANG, N., & FERNANDO, M., 2007. Open source GNSS reference server. 20th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Fort Worth, Texas, 25-28 September, 2224-2229. (Download PDF)
• YAN, T., MUMFORD, P., DEMPSTER, A.G., RIZOS, C., HOANG, N., & FERNANDO, M., 2007.  Open source A-GNSS reference server.  IGNSS2007 Symp. on GPS/GNSS, Sydney, Australia, 4-6 December, paper 147, CD-ROM procs. (Download PDF)