RE: How to Correct Measured Thrust for Density Altitude?
On a "Pure Jet" engine... there isn't a general formula for thrust and pressure/altitude density.
On a prop, or fan jet... you can calculate how the prop/fan pulls on the available air. In a pure jet... you loose power, and in turn, lose thrust. Since none of these engines have the same efficiency... and since our engines make thrust exponentially... the actual thrust lost equation would be specific to the engine you are working with.