Ionospheric Limitations in the Ultimate Accuracy of Direction Finding.

摘要

Wide aperture direction finders are shown experimentally to have the potentiality of providing greater bearing accuracy than normal site and instrument errors will permit. Under typical ionospheric conditions, and working against 'burst' type transmissions from low powered transmitters, a direction finder with an aperture of 1000 feet usually obtains a useful bearing resolution of 0.25 degree. It is recommended that in undertaking the construction of a wide aperture system, great care be used in the siting and in the fabrication of the antenna. Small compromises in design and erection could easily cause errors that would mask the inherent accuracy of the over-all system. (Author)