PRECISION TIME OR FREQUENCY TRANSMISSION TO MOVING VEHICLES

Abstract

A circuit is described which is capable of transmitting the output of an ultra-stable oscillator or clock with an e9tremely high degree of accuracy to a moving vehicle. First order Doppler frequency shift of the form fv/c, as caused by the velocity of the vehicle rela tive to the transmitting station, is cancelled, while second-order Doppler is largely eliminated. Because of these features, the circuit makes application of very stable frequency sources to vehicle electronic systems possible to degrees of stability which could previously not be achieved or even approached by several orders of magnitude. Applications of the circuit include radio navigation, guidance, and tracking, as well as data transmission, telemetry, and possibly communications involving earth satellites, moon satellites, and interplanetary and other space vehicles.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0405044

Entities

People

  • Richard M. Waetjen

Organizations

  • Air Force Cambridge Research Laboratories

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Aircrafts
  • Artificial Satellites
  • Circular Orbits
  • Controlled Environment
  • Difference Frequency
  • Discriminators
  • Doppler Effect
  • Equations
  • Frequency
  • Frequency Shift
  • Ground Stations
  • Latitude
  • Oscillators
  • Space Stations
  • Spacecraft
  • Vehicles

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Radio communications and signal processing.
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Microelectronics
  • Space
  • Space - Space Objects