Modern reconnaissance and weapons in the April 1945 Germany scenario

What future technology would Germany need in April 1945 to begin reversing its military position?

The proposed combination is satellite reconnaissance, long-range rocket artillery and modern air defences; cruise missiles alone are judged insufficient.

The Germany follow-up begins with the need for satellite reconnaissance and surveillance. Cruise missiles alone are judged insufficient against the situation in April 1945. Long-range multiple-launch rockets are proposed against approaching formations, while air defence would require missiles and modern radar-guided guns. The scenario depends on those systems working with the reconnaissance information.