DESIGN CONSIDERATIONS FOR THE APN-79 AIRBORNE DOPPLER NAVIGATION SYSTEM

George M. Miller

Peer Reviewed

Abstract: The speeds of modern aircraft have increased to the point where it is extremely difficult for an operator to perform the function of navigation by conventional methods. In order to solve this problem several automatic navigation computers have recently been developed and described in the literature.1 The primary task performed by these dead-reckoning computers is to integrate the geographic components of aircraft velocity to obtain the distance traveled from a departure point. They operate on automatic inputs of true air speed and magnetic heading. They also require the manual insertion of the approximated wind velocity and magnetic variation. This paper will show how more accurate ground velocity can be obtained using the Doppler principle. This more accurate ground velocity is used to compensate a true north gyro compass which operates independently of the earth’s magnetic field. In this manner the above-mentioned manual inputs are eliminated and a more accurate and completely automatic navigation system is mechanized.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 6, Number 3
Pages: 147 - 156
Cite this article: Miller, George M., "DESIGN CONSIDERATIONS FOR THE APN-79 AIRBORNE DOPPLER NAVIGATION SYSTEM", NAVIGATION, Journal of The Institute of Navigation, Vol. 6, No. 3, 1958, pp. 147-156.
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