So far, only three countries in the world can provide military signal of satellite navigation and positioning services, are free to use their own satellite navigation and positioning system to develop its own satellite guided weapons, they are China’s beidou, the us GPS and Russian glonass. Advanced technology can improve the security of the country.
Due to the importance of military satellite positioning system, all military powers attach great importance to the interference and anti-jamming performance of satellite positioning system. So, if the GPS and the beidou satellite are disturbed on the battlefield, can the two sides fight normally? In many ways, GPS satellite positioning and GPS tracking are important for military.
China’s armed forces and military researchers have profound experience over the years, whenever China must carry on the large-scale military action or large domestic weapon test, theater over the GPS satellite signal is always “happen to” some fault occurs, either by intermittent close or reduce strength. This results in the error of satellite positioning and navigation, which can easily cause errors and can not accurately obtain the actual data information.
Ukrainian civil war and the war in Syria in recent years, western forces found in Russian theater GPS jamming ability, can in a period of time will weaken or completely blocked the whole civil war zone of GPS signal, many civil aviation organization and sailing ships of unstoppable report, civilian GPS is suspected Russian interference, so, in recently warned, be wary of Russian troops on the navigation system of electronic warfare capabilities.
Both Russia and China attach great importance to GPS interference, and the production of GPS jammer can interfere with ordinary military GPS receivers. The simplest way to do this is to delay processing of the GPS signal and then broadcast it, when the enemy’s GPS receiver receives a false signal.
It doesn’t seem to complete its shielding, the latest GPS satellite is has the capability of anti-interference in two band released two military navigation code, can constitute four work modes in actual combat, which can greatly improve the ability of anti-jamming. America’s military GPS receiver has a important anti-jamming technology, is “gramm application components and SAASM deceives module, is a kind of standard electronic plug-in, can be inserted into the aircraft, warships, missiles and all kinds of weapons.
In addition, in order to improve the operational performance of military GPS, the U.S. military will deliberately reduce or even close the civilian signal of the enemy theater in wartime, and improve the intensity of military signals. Beauty on April 14, Britain and France, for example, to use cruise missiles to Syria launched a massive air strikes, U.S. troops on the evening of April 13 to 14, in the morning to Syria war zone of L2 suddenly increase military band of GPS signal, signal intensity is about a times more than usual, the moves are China’s beidou system foundation continuous detected, concurrent warned.
So it’s not easy to reliably interfere with military GPS signals in the battlefield.
Finally is to emphasize that in the field of weapon application, GPS satellite guidance system is not people imagination of so magical, is based on GPS as supplementary guidance, very few weapons simply use GPS as the only guidance system. Generally, GPS/INS combination guidance, namely inertial guidance +GPS global positioning system auxiliary guidance. The output frame rate of INS inertial guidance is high, and the crystal vibration time is accurate, so the guidance is based on the inertial system, but the drift of INS is large, and the accumulation error needs to be corrected by GPS.