DocumentCode
852261
Title
The AN/APN-81 Doppler Navigation System
Author
McMahon, Frank A.
Author_Institution
General Precision Laboratory Inc., Pleasantville, N. Y.
Issue
4
fYear
1957
Firstpage
202
Lastpage
211
Abstract
The AN/APN-81 is a self-contained Doppler navigation system which accurately determines ground speed and drift angle independently of ground aids. This paper explains the techniques employed in the measurement of ground speed and drift angle. The beam pattern is described and major system parameters are given. In block diagram form, the functions of the transmitter and receiver, the frequency tracker, and the wind computer are explained. Accuracies of measurement and some specific applications of the equipment are given.
Keywords
Aerospace control; Aircraft navigation; Control systems; Doppler radar; Frequency; Laboratories; Radar tracking; Velocity control; Velocity measurement; Wind speed;
fLanguage
English
Journal_Title
Aeronautical and Navigational Electronics, IRE Transactions on
Publisher
ieee
ISSN
0096-1639
Type
jour
DOI
10.1109/TANE3.1957.4201554
Filename
4201554
Link To Document