As I understand it may be the SR-71 Dvina knock .
To shoot when the target beyond 76 km, 80 km to the well you can shoot , I realized .

No. It is IMPOSIBLE to shot down SR-71 using SA-2F Dvina, with current version of SAM Simulator. It is POSSIBLE to do it with version 932.1.
I want to see how looks an impossible shot, but Hpasp used "Volkhov", and didn't make it as I want it... nope
Obviously must wait for the next version, to make it by myself... sigh