DISPERSION OF FREQUENCIES IN THE OMEGA NAVIGATION SYSTEM
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
It has been proposed to solve the lane identification problem in the Omega navigation system by the transmission of signals at two or more frequencies to produce beat frequencies. A frequency of 13.6 kiloHertz kHz will be used with the basic 10.2 kHz transmissions to obtain a three-to-one increase in the width of the ambiguities. The phase velocities of waves at 10.2 kHz and 13.6 kHz are not the same, so a four-to-three relationship of wave lengths will not exist and correction factors will be required to obtain lane identification. Observations were made in an aircraft flying from the transmitting stations out to ranges of 4000 miles. The results show that calculated differences in velocity of propagation will be accurate enough to obtain reliable lane identification. The necessary corrections could be provided for the navigator in the form of simple tables.
- Air Navigation and Guidance
- Radio Communications