The N019 was further compromised by Phazotron designer Adolf Tolkachev’s betrayal of the radar to the CIA, for which he was executed in 1986. In response to all of these problems, the Soviets hastily developed a modified N019M "Topaz" radar for the upgraded "MiG-29S" aircraft. However, "VVS" was reportedly still not satisfied with the performance of the system and demanded another upgrade. The latest upgraded aircraft offered the N010 "Zhuk-M", which has a planar array antenna rather than a dish, improving range, and a much superior processing ability, with multiple-target engagement capability and compatibility with the Vympel R-77 (or RVV-AE).