The GPS cell phone jammer during Red Flag and other exercises this winter are intended to prepare pilots and air crews for operations under those sorts of hostile electromagnetic conditions. The Army will conduct its own GPS jamming exercises as well at Fort Bragg in North Carolina, Fort Polk in Louisiana, and at the National Training Center at Fort Irwin, California, during the same timeframe.In principle, yes. But modern frequency-hopping technology makes it very difficult, because the jammer can’t predict what frequency will be used from one moment to the next. The only practical approach is a broad-band assault on the entire frequency range, which requires a very large amount of power.
Head of Norway’s military intelligence, Morten Haga Lunde, confirms in an interview with Aftenposten Russia’s jamming during Zapad-2017. «GPS jamming was practiced, electronic warfare. Most likely, this drone jammer was aimed at interfering Russia’s own forces’ use of GPS. A side-effect, however, affected Widerøe and intercontinental flights that Russia should have seen coming.» In Finnmark, regional airliner Widerøe has commercial daily flights to 11 airports, while SAS flies to Alta and Kirkenes
This is the time for one more important clarification. Usually, in the Anti-Drone application, the intention is to jam the Drone when it is hundreds of meters away from the sensitive area/perimeter (where the Jammer is installed). For example, we want to jam a Drone, which is 300 meters away from the Jammer and flying at an altitude of 10 meters. As can be understood, in this case the diagonal distance between the Jammer and the Drone is about the same as the horizontal distance between them. Therefore, in order to simplify things, we will be discussing horizontal distances and we will not bother our selves with calculating the exact distance, because the difference is quite small.
Authorities said in an incident beginning around 7:15 p.m. on Sunday, inmates housed in multiple dorms at Lee Correctional were involved in a disturbance. The riot resulted in the deaths of seven inmates and the injury of 17 others at the maximum-security prison.Jamming cell phone signals during class will undoubtedly bring good effect to teachers, students and classroom order. However, the school should make public the screening period, so that teachers and students can give a warning to friends and relatives in advance, so as to avoid other adverse consequences due to lack of contact in the event of emergency. Schools may also consider other ways of providing emergency access to teachers and students during the screening period for emergencies.