For my :2c:, I would say that we require a ground radar such as the Giraffe that will replace the ADATS in a couple of years to work with the ASCC to provide a concise air picture. Weapon wise, I believe that Canada should look at a MANPAD system, with the realization that the major threat for AD will be in the counter UAV or helo. A MANPAD would also provide adequate close protection against fast air in places like the Congo or the Sudan. A MANPAD such as the RBS 70 would be cheap ($3000/missile compared to the ADATS $250,000/missile) and would need less manpower.