Bibliographic Citation
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Title | Application of GPS in a high precision engineering survey network |
Creator/Author | Ruland, R. ; Leick, A. |
Publication Date | 1985 Apr 01 |
OSTI Identifier | OSTI ID: 5754805; DE85010556 |
Report Number(s) | SLAC-PUB-3620;CONF-8504111-1 |
DOE Contract Number | AC03-76SF00515 |
Resource Type | Conference |
Specific Type | Technical Report |
Resource Relation | 1. international symposium on precise positioning with the global positioning system; 15 Apr 1985; Rockville, MD, USA |
Research Org | Stanford Linear Accelerator Center, CA (USA); Air Force Geophysics Lab., Hanscom AFB, MA (USA) |
Subject | 430303 -- Particle Accelerators-- Experimental Facilities & Equipment; STANFORD LINEAR COLLIDER-- GEODETIC SURVEYS; ALIGNMENT;DATA PROCESSING;EXPERIMENTAL DATA;SATELLITES |
Related Subject | ACCELERATOR FACILITIES;ACCELERATORS;DATA;GEOPHYSICAL SURVEYS;INFORMATION;LINEAR ACCELERATORS;NUMERICAL DATA;PROCESSING;SURVEYS |
Description/Abstract | A GPS satellite survey was carried out with the Macrometer to support construction at the Stanford Linear Accelerator Center (SLAC).^The network consists of 16 stations of which 9 stations were part of the Macrometer network.^The horizontal and vertical accuracy of the GPS survey is estimated to be 1 to 2 mm and 2 to 3 mm respectively.^The horizontal accuracy of the terrestrial survey, consisting of angles and distances, equals that of the GPS survey only in the ``loop`` portion of the network.^All stations are part of a precise level network.^The ellipsoidal heights obtained from the GPS survey and the orthometric heights of the level network are used to compute geoid undulations.^A geoid profile along the linac was computed by the National Geodetic Survey in 1963.^This profile agreed with the observed geoid within the standard deviation of the GPS survey.^Angles and distances were adjusted together (TERRA), and all terrestrial observations were combined with the GPS vector observations in a combination adjustment (COMB).^A comparison of COMB and TERRA revealed systematic errors in the terrestrial solution.^A scale factor of 1.5 ppM +- .8 ppM was estimated.^This value is of the same magnitude as the over-all horizontal accuracy of both networks.^10 refs., 3 figs., 5 tabs. |
Country of Publication | United States |
Language | English |
Format | Pages: 11 |
Availability | NTIS, PC A02/MF A01. |
System Entry Date | 2001 May 13 |
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