Just guessing by reports that some of them get both lost wildly of course and do strikes wildly off target, and some ran into the ground, which is consistent with, say, few of them being hit by gusts of strong wind which overwhelmed the INS, or some of them getting a freak barometric input.

And unlike with early ICBMs, precise accelerometer and airspeed inputs can provide quite good measure of lateral forces.

Were they had a satellite, or used HF comms, somebody would've either timed the satellite, or spotted the HF signal long ago. And there were no sign of a huge satellite dish one needs to communicate to satellites in high orbit in found drone remainings.