MEASUREMENT OF IONOSPHERIC EFFECTS ON CURTS SOUNDER/COMMUNICATIONS TERMINAL SEPARATIONS.
Abstract
This report describes experimental work concerned with the variation of selected oblique-incidence ionogram parameters (LOP, MOF, and mode MOF) as the location of the sounder terminal is moved. In the experiment, sounder transmitters were located at Fort Monmouth, New Jersey and at San Angelo, Texas. One receiver was fixed at Mountain View, California, while two mobile receivers were located at various distances, up to 300 km, east and north of Mountain View. A prediction technique is presented for estimating the parameters at a distant site when their values are known at a reference location. Observation of the two mid-latitude paths during time of geomagnetic calm show that ionospheric effects increase MOF and mode MOF rms prediction error by about 0.1 Mc per 100 km and increase LOF prediction error by about 0.05 Mc per 100 km. Geomagnetic disturbances can increase the prediction error by a factor of at least two. Application of the results to representative nodes in the DCS HF communications network is discussed in detail, with examples. The effects of site topography, equipment differences, and temporal prediction errors are evaluated. The extent to which the conclusions can be applied to other paths and seasons and to ionospheric disturbed periods is discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1965
- Accession Number
- AD0624253
Entities
People
- Harry A. Turner
Organizations
- SRI International