| 摘要 |
An air training evaluation process which corrects the position and velocity sensed by an aircraft's inertial navigation system (INS) to obtain more accurate data on the aircraft's position during an engagement. In carrying out the process the aircraft's on-board INS system is employed to obtain pre-flight data on position and velocity, data on position and velocity during the engagement, and post-flight data on position and velocity. The pre-flight data on position and velocity and the post-flight data on position and velocity are compared with independently determined data on the pre-flight position and velocity of the aircraft and with independently determined data on the post-flight position and velocity of the aircraft respectively to obtain pre-flight error functions and post-flight error functions on position and velocity. These functions and the known time variant drift characteristics of position and velocity of the INS are employed to derive position and velocity correction functions during the time of the engagement. The position and velocity correction functions are employed to correct the INS data on position and velocity during the engagement. The corrected data then are employed to display post-flight, a more accurate position of the aircraft during the engagement relative to background portrayals of features or terrain on the earth. During an engagement of two or more aircraft, aircraft-to-aircraft or aircraft-to-ground corrections may be made to the corrected INS data post-flight for further enhancement of accuracy of the INS data.
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