Network First measurements made in July 1992: just after start of International GPS Service(IGS). Since then measurements each year and often multiple campaigns per year. The current network has over 1000 sites, many of them being ecovery marks for the main stations(typically 3 per locatio Network extends from Kyrgyzstan to the Kazakh Platform In 1995. the first continuously operating stations installed Currently, 9 continuous sites with 2 IGS sites(POL2, SELE) Results available on web at delay estimates) 12540Lec23 Regional view of network Zoom Eurasia Fixed ⊙ Frame realized TRF2000 50% confidence 05/1203 12540Lec23Network • Development of Network – First measurements made in July 1992; just after start of International GPS Service (IGS). Since then measurements each year and often multiple campaigns per year. – The current network has over 1000 sites, many of them being recovery marks for the main stations (typically 3 per location) – Network extends from Kyrgyzstan to the Kazakh Platform – In 1995, the first continuously operating stations installed. Currently, 9 continuous sites with 2 IGS sites (POL2, SELE) – Results available on web at: http://www-gpsg.mit.edu/~tah/cont98g/cont98.html (Pages include time-series, phase residuals, atmospheric delay estimates) 05/12/03 12.540 Lec 23 5 05/12/03 12.540 Lec 23 6 Regional view of network Zoom Eurasia Fixed Frame realized using ITRF2000 50% confidence ellipses shown 3