NERC BNSC ILRS NSGF Home Page IGS
GPS Analysis
On site are two GNSS receivers, HERS and HERT. These track GPS satellites and send data daily and hourly to the International GPS Service. HERS is an IGS site. HERT, a joint GPS and GLONASS receiver, came online in March 2003 and is in addition being used to take part in the EUREF-IP pilot programme to stream data directly into the internet for rapid re-broadcast for general real-time navigational applications. Using GAMIT and GLOBK software and IGS satellite orbits, daily coordinates are generated by SGF for both sites and for two networks.

NETWORKS
A European regional network of 10 sites solved using GAMIT which is then stabalized to the SOPAC eurp network of pre-processed site co-ordinates.

Click here to see full daily results.

Daily analysis of a global network using the HERS and HERT sites and producing weekly co-ordinates is presented here.

BASELINES



Image produced from the Ordnance Survey Get-a-map service. Image reproduced with kind permission of Ordnance Survey and Ordnance Survey of Northern Ireland.
 HERT is approximately 136m from HERS. The two receivers are therefore tracking the same satellites at the same time and are under identical atmospheric, tidal and plate motion conditions. This situation allows a very accurate inter-site baseline to be calculated each day. See here for full results.


Go to HERS site information
Go to GPS quality checks
Go back to Research and Development Page
Go back to SGF main page