[IgorBog61650384]

Russia has a long history of GPS jamming for security reasons. A friend serving in the russian forces in Syria says that GPS accuracy in the country varies dramatically with Russian military activity in the region. About two years ago there were a series of posts about GPS distortion around Moscow center (https://news.ycombinator.com/item?id=26060590, https://money.cnn.com/2016/12/02/technology/kremlin-gps-sign...). But this happens not only in Russia, also in the US as an anti-drone measure (https://eu.usatoday.com/story/tech/news/2017/09/26/gps-spoof...)