Accession Number : AD0615392

Title :   ELECTRONIC SURVEY SYSTEM.

Descriptive Note : Final rept.,

Corporate Author : HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s) : GOODMAN,Robert S.

Report Date : 30 MAR 1965

Pagination or Media Count : 76

Abstract : The feasibility of developing an electronic survey system to determine the positions of locators within a circular area of 10 mi diam was studied. An accuracy of 2 1/2 ft is required of the system. The system analyzed has four reference stations (three slave transponders and a master command station) and portable locators (free-running pulse transmitters) as necessary. The locators are interrogated by the master station and their position is computed in real time. The computation is essentially a computation of the intersection of two hyperbolas. The design of a system with available components is described, but analysis indicates that errors of 5 to 8 ft can be expected. Analysis of the characteristics of electromagnetic propagation near the ground indicate that errors due to transmission irregularities can be adequately eliminated. Although some improvements in accuracy might be expected by using improved components, the improvement would not be adequate for this application without high accuracy in positioning reference stations. (Author)

Descriptors :   (*SURVEYING(GEOGRAPHIC), RADIO BEACONS), (*RADIO BEACONS, SURVEYING(GEOGRAPHIC)), MAPPING, RADIO TRANSMISSION, FEASIBILITY STUDIES, DETECTORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE