据《IDR》19年5月报道，俄罗斯雷达设计公司同美国合作研究Barrier超高频（VHF）双基地雷达网络原理。Barrier是以俄雷达设计公司装有发射接收机的VHF雷达装置为基础的。据称该系统对付低空飞行的飞机非常有效。还声称来自导弹导引头天线的辐射难以与Barrier使用的VHF波长相匹 According to “IDR” reported in May 19, the Russian radar design company and the United States to study Barrier UHF (VHF) bistatic radar network principle. Barrier is based on a VHF radar unit with a transmitter and receiver installed by the Russian Radar Design Company. The system is said to be very effective against low-flying aircraft. It also claims that the radiation from the missile seeker antenna does not match the VHF wavelength used by the Barrier