Function density_altitude_v1 

pub fn density_altitude_v1(
    request: &DensityAltitudeRequestV1,
) -> Result<DensityAltitudeResponseV1, SolveErrorEnvelopeV1>

Resolve request.atmosphere exactly as a solve would, check that the air it describes can exist and lies where these formulas hold, then report its pressure altitude, both density altitudes and its air density.

Errors are the solve’s own validation envelope, located at $.atmosphere.*.