Basic Design Considerations--Automatic Navigator AN/APN-67

Some of the considerations involved in the design of the Automatic Navigator, AN/APN-67, are presented along with a description and photographs of the equipment design selected. Characteristics of the Doppler signal are also described. The microwave part of the system utilizes two continuous-wave pencil beams generated by a klystron transmitter and a single fixed mounted, space duplexed antenna with offset antenna feeds. The Doppler data are stabilized by use of computing elements and vertical reference data. Advantages of this design relative to other alternatives are pointed out.