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NTIA Report TR-97-337Field Strength Measurements of DGPS and FAA Beacons in the 285- to 325-kHz BandJune 1997J.R. Hoffman, J.J. Lemmon, R.L. Ketchum |
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Abstract: Signal strength measurements in the 285- to 325-kHz band were conducted on eight U.S. Coast Guard differential global positioning system beacons along the Gulf and West Coast, and on a Federal Aviation Administration beacon in Bennett, Colorado. Data were acquired continually en route between sites and tagged with geographical position. Field strength of each individual signal was plotted against distance from the transmitter. Cumulative distributions and histograms of deviation from the least squares fit were also plotted. Results of the measurements were used as model inputs and to compare results to model predictions. |
Keywords: differential GPS (DGPS); global positioning system (GPS); signal strength measurements; U.S. Coast Guard beacon; FAA beacon; propagation models |
Disclaimer: Certain commercial equipment, components, and software are identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses. |
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