Astronomical azimuth determination by the hour angle of polaris using ordinary total stations

Lambrou, E; Pantazis, G

dc.contributor.author	Lambrou, E	en
dc.contributor.author	Pantazis, G	en
dc.date.accessioned	2014-03-01T01:27:57Z
dc.date.available	2014-03-01T01:27:57Z
dc.date.issued	2008	en
dc.identifier.issn	0039-6265	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18653
dc.subject	Astronomical azimuth	en
dc.subject	Hour angle	en
dc.subject	Polaris	en
dc.subject	Quartz clock	en
dc.subject	Total station	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.classification	Remote Sensing	en
dc.subject.other	accuracy assessment	en
dc.subject.other	astronomy	en
dc.subject.other	azimuth	en
dc.subject.other	coordinate	en
dc.subject.other	efficiency measurement	en
dc.subject.other	geodetic network	en
dc.subject.other	GPS	en
dc.subject.other	zenith angle	en
dc.title	Astronomical azimuth determination by the hour angle of polaris using ordinary total stations	en
heal.type	journalArticle	en
heal.identifier.primary	10.1179/003962608X290951	en
heal.identifier.secondary	http://dx.doi.org/10.1179/003962608X290951	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The determination of the astronomical azimuth of a line is not a difficult task for surveyors any more. The aim of this paper is to analyze the theoretical details and errors in order to propose the use of ordinary total stations, for an easy, efficient and accurate determination of the astronomical azimuth of a line by the hour angle method via Polaris sightings. As many modern total stations have a built - in quartz clock they can register automatically the UTC time as well as the angle measurements (horizontal and zenith) of each observation. The total fieldwork time needed is about 10 minutes and the accuracy that may be achieved is about ± 2D' 7his procedure will be proven to be easier than the determination of the geodetic azimuth of the same line. The calculation is independent and the result is free of the errors that the coordinates of a survey mark may contain, because they are not used. However good positional data is required from other sources. Astronomical azimuths are an alternative solution for the surveyors in order to check or orient their field surveys and arbitrary networks independent of the GPS system. © 2008 Survey Review Ltd.	en
heal.publisher	COMMONWEALTH ASSOC SURVEYING LAND ECONOMY, C A S L E	en
heal.journalName	Survey Review	en
dc.identifier.doi	10.1179/003962608X290951	en
dc.identifier.isi	ISI:000254629800007	en
dc.identifier.volume	40	en
dc.identifier.issue	308	en
dc.identifier.spage	164	en
dc.identifier.epage	172	en