January 1970 | NTIA Technical Memo OT ITS TM 16
Backscatter studies and 3-D ray tracing final report Jan. 1969-Jan. 1970, Part 2. Range estimation
Lowell H. Tveten
Abstract: A description of the development and details of a range estimation computer program is presented. The program was tested with about 1700 range estimates with known sources. While the median range estimate errors generally fell in the 5-10 percent range, substantial number of estimates were in error by greater than 20 percent. The principal reason for these large errors is that the wrong propagation modes are chosen to be used in making the estimates. The principal factor responsible for the width of the error distributions when the correct modes are chosen appears to be the height of the bottom of the reflecting layer estimated from backscatter observations. Future work should concentrate upon correcting these errors.
Disclaimer: Certain commercial equipment, components, and software may be 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.