Anti-radiation missile was achieved by the SAM site's radar receiver locking on to radio noise emissions generated by an aircraft's jamming pod. In cases of heavy jamming, missiles were often launched exclusively in this mode; this passive tracking meant that SAM sites could track targets without needing to emit any radar signals, and so American anti-radiation missiles could not be fired back in retaliation. Recently, the People's Republic of China developed the FT-2000 system to counter AEW and AWACS targets. This system is based on the HQ-9, which is in turn based on the S-300PMU. These anti-radiation missile systems have been marketed
A-sound Best Sound ). A-Sound put out their debut album in July 2008: Release. It was the first Mongolian rock album to feature some songs in English. The album featured many popular songs, including: "Uyanga," "Shine On," and "Forever." "Uyanga" is a popular girl's name and is a pleasant song sung in Mongolian. "Shine On" and "Forever" are two slices of immaculate pop song-craft, and to music critic (among other things) Brian Offenther, should have been international pop smashes. In "Forever," lead singer Temuulen's crystal clear voice really sours. In early 2009, a deluxe version of Release was put out and