Russia: Russia has “taken under control” the operation of 11 American GPS sites and ensured they cannot be used for military purposes, as Washington and Moscow show no progress in negotiations on setting up Russian GLONASS stations on US territory.
May 31 was the last day when Russia and the US could have reached a deal on the issue.
“In compliance with the Russian government’s instruction, Roscosmos and the Federal Agency for Scientific Organizations implemented measures on June 1, 2014, which excluded the use of information from global seismographic network stations working on signals from the GPS system and located on the territory of the Russian Federation for purposes not stipulated by the existing agreements, including for military purposes,” said Russia’s Federal Space Agency (Roscosmos).
"We have worked out and implemented measures that exclude the use of these [GPS] stations for military purposes. Now they are under our full control," Rogozin, who is in charge of space and defense industries, wrote in his Twitter micro blog.
The Differential GPS ground stations located on Russia’s soil will continue to operate under existing agreements to fulfill civil purposes. The so-called DGPS provides differential corrections to a GPS receiver in order to improve position accuracy.
The correction is received by the roving GPS receiver via either a radio signal or a satellite signal, depending on whether a source is land-based or satellite-based, and applied to the position it is calculating.