I believe you're looking for pp. 75-76. Presumably, after a round of scanning for threats, the mobile SAM scooted about 100m at 4:54 AM, and went into Standby mode. They changed their direction, but did not reset north, resulting in a 105-degree error. They switched the radar on again at 6:07, and acquired a target at 6:14, apparently bearing 250 and heading 56, but actually bearing 143 and heading 309. At 6:14:19, they reported the contact to the Coordination Center and twenty seconds later fired. According to the Iranian military, which provided this information, the Coordination Center did not receive the call, nor could it be heard on their recordings.