Experimental Research on the Propagation of Loran-C Signals. Volume C. The Measurement System.

摘要

This report describes the design, assembly, and electrical matching of two identical measurement systems that were used in an experiment conducted by APL for the U.S. Air Force and the Defense Advanced Research Projects Agency to determine the validity of one facet of the theory of groundwave propagation at 100 kHz. It is Volume C of four volumes. Volume A is the summary report, Volume B covers test operations, and Volume D documents the data and analysis. The goal of the experiment was to determine if an analytic function could be developed for operational use that relates secondary phase factor (SPF) to envelope to cycle difference (ECD) so that geodetic position can be computed accurately and in real time. Field test data were collected and analyzed and show trends that tend to support the hypothesis that the desired functional relationship exists, at least under certain conditions. Additional analysis and perhaps tests will be necessary to define these conditions or to prove conclusively the existence of such a relationship. (Author)