2-11. The Army process preplanned and immediate ASRs through the Army air-ground system to identify air support requirements to the supporting air component. Pre-planned ASRs are processed per the battle rhythm in sufficient time to meet the planning stages of the joint air tasking cycle and sourced on the initial published air tasking order. Immediate ASRs arise after the air tasking order is published and must be sourced by assets already tasked on the air tasking order. Scheduled and/or on-call air missions are tasked to support preplanned ASRs. Scheduled missions are planned against targets on which air attacks are delivered at a specific time. On-call missions (X-airborne alert and G-ground alert) are planned against target types for which a need can be anticipated for a timeframe. On-call air missions are preferably tasked to support immediate ASRs to satisfy dynamic targeting requirements.