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- W249377118 abstract "Abstract : A methodology was developed to provide calibration data for Loran-C navigators designed to be used in harbor, harbor entrance areas. Visual aids to navigation are used as a position reference whenever possible. An electronic positioning system is used when available visual aids to navigation are not satisfactory. The data acquisition system, data collection techniques and data analysis procedures have been field tested in New York Harbor, Delaware Bay and River and the St. Marys River (Michigan). The calibration points, waypoints, are calculated for each intersection of commonly used tracklines in a harbor area. Additional calibration points, termed track-points, are added as necessary to minimize position errors. A typical harbor with 20-30 waypoints can be surveyed over a two week period. A survey crew consists of three to five persons; a survey using only visual aids could be accomplished with as few as two. The survey data is analyzed in the field as the survey progresses to prevent the need to resurvey. This document provides a brief description of the data acquisition system, Time-Difference Survey System (TDSS); and a detailed description of data collection and data analysis procedures. (A complete description of the TDSS may be found in the Coast Guard Research and Development Center Report, 'Time Difference Survey System (TDSS)'). Improvements and expanded utilization to the TDSS is discussed. Also discussed is a technique analogous to a track plotter for user equipment self-calibration." @default.
- W249377118 created "2016-06-24" @default.
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- W249377118 date "1982-11-01" @default.
- W249377118 modified "2023-09-27" @default.
- W249377118 title "HHE/LORAN-C Surveying." @default.
- W249377118 hasPublicationYear "1982" @default.
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