The Ukrainian Air Force specifies that several aircraft are still airborne. It recorded impacts at 24 sites and falling debris at 10 others.
This positioning system, crucial for intercepting certain Russian drones, had already been restricted in October.
The announcement comes as the attacks continue, despite the resumption of talks aimed at ending the war between Russia and Ukraine.
A Russian strike hit a hospital in Kyiv overnight and started a fire.
For its part, Moscow says it shot down 1,198 Ukrainian drones overnight.
The Russian military reports 17 regions hit, including the Moscow region.
The EU's chief diplomat welcomed the announced presence of Europeans at the upcoming negotiations.
This participation is confirmed as Russian drones continue to strike Ukraine.