초록 ▼

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-

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.

대표청구항 ▼

A method of correcting data on an aircraft\s position relative to the earth, said data being obtained during flight with an inertial navigation system (INS) on board said aircraft, comprising the steps of: prior to commencing an aircraft engagement, determining the pre-engagement position of said ai

A method of correcting data on an aircraft\s position relative to the earth, said data being obtained during flight with an inertial navigation system (INS) on board said aircraft, comprising the steps of: prior to commencing an aircraft engagement, determining the pre-engagement position of said aircraft relative to the earth independently of said INS, at said pre-engagement position, operating said INS to obtain pre-engagement INS data on the position of said aircraft relative to the earth, recording said pre-engagement INS data on position obtained by said INS at said pre-engagement position, flying said aircraft in an engagement, during said engagement of said aircraft continuing to operate said INS to obtain INS data on the position of said aircraft relative to the earth, recording the INS data obtained on position during said engagement, after the termination of said engagement by said aircraft, determining the post-engagement position of sad aircraft relative to the earth independently of said INS, at said post-engagement position, operating said INS to obtain post-engagement INS data on the position of said aircraft relative to the earth, recording said post-engagement INS data on position obtained by said INS at said post-engagement position, comparing said independently determined pre-engagement position of said aircraft with the pre-engagement INS data on position to obtain pre-engagement error functions of position, comparing said independently determined post-engagement position of said aircraft with the post-engagement INS data on position to obtain post-engagement error functions of position. employing said pre-engagement error functions of position, said post-engagement error functions of position and the known time-variant drift characteristics of position of said INS to derive position correction functions during said engagement, employing said position correction functions to correct the recorded INS data obtained on position during said engagement to obtain corrected INS data on position during said engagement, and storing said corrected INS data on position.