Historical info is accrued and used to foretell future place for use with air traffic management, risk estimation, combat system doctrine, gun aiming, and missile guidance. Position knowledge is accrued by radar sensors over the span of some minutes. Mainlobe jamming can typically solely be reduced by narrowing the mainlobe strong angle and cannot totally be eliminated when instantly facing a jammer which uses the same frequency and polarization as the radar. Sidelobe jamming could be overcome by decreasing receiving sidelobes in the radar antenna design and by utilizing an omnidirectional antenna to detect and disregard non-mainlobe indicators. Other anti-jamming techniques are frequency hopping and polarization...