Methods and systems for a precision Doppler-based airborne platform velocity measurement system are presently disclosed. An example method comprises transmitting a radar signal with an antenna of an airborne platform. The method also includes receiving at least one radar reflection with the antenna. As part of the method, one or more processors may be configured to determine (i) a falling edge of a Doppler signature of the received radar reflection and (ii) a signal representative of an airspeed based on the falling edge of the Doppler signature. Additionally, the method includes providing the determined signal to an inertial measurement system. Further, the method includes determining location parameters of the airborne platform by the inertial measurement system, including determining at least one sensor adjustment for the inertial measurement unit based on the determined signal. Finally, the method includes operating the inertial measurement system with the sensor adjustment.
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