The reason for a somewhat unusual series of two launches of ABM interceptor in a row, conducted in October 2007, was that the Space Forces are working on an upgrade of the Don-2N radar of the Moscow ABM system. According to Vladimir Popovkin, the commander of the Space Forces, the first test was conducted to confirm characteristics of the missile and the second one - to test the "new computational system and its software" that is being installed at the Don-2N radar. The tests took place on October 11, 2007 and October 30, 2007.