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Coutinho's method for the altitude

2020-07-01Artigo científico Acesso aberto
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dc.contributor.authorCanas, António Costa
dc.contributor.authorMarabujo, Magda Ramires
dc.contributor.authorSousa, Teresa
dc.contributor.institutionCMA - Centro de Matemática e Aplicações
dc.contributor.pblCambridge University Press
dc.date.accessioned2020-11-05T23:44:32Z
dc.date.available2022-02-17T01:31:01Z
dc.date.embargoedUntil2021-01-01
dc.date.issued2020-07-01
dc.descriptionUID/MAT/00297/2019
dc.description.abstractIn the first aerial crossing of the South Atlantic, by Gago Coutinho and Sacadura Cabral in 1922, several methods of astronomical maritime navigation were used with adaptions to aerial navigation. In order to apply these methods, the navigator needed to know the approximate altitude of the aircraft so that its position could be determined. The instrument available at that time, the altimeter, did not give reliable values for altitude. Therefore, Coutinho had to devise a method that enabled the navigator to determine the altitude quickly and efficiently. The method Coutinho devised is based on a mathematical and geometrical procedure. In this paper, we study in detail Coutinho's method to determine altitude, with diagrams to aid understanding of the deductions and calculations. We also present a real example of how this method would be used during the flight.en
dc.description.versionauthorsversion
dc.description.versionpublished
dc.format.extent13
dc.format.extent541828
dc.identifier.doi10.1017/S0373463319000961
dc.identifier.issn0373-4633
dc.identifier.otherPURE: 19018913
dc.identifier.otherPURE UUID: 1e77e010-c09f-4489-ae8d-fd377c3a58b1
dc.identifier.otherScopus: 85076707338
dc.identifier.otherWOS: 000544382400007
dc.identifier.urihttp://hdl.handle.net/10362/106686
dc.identifier.urlhttps://www.scopus.com/pages/publications/85076707338
dc.language.isoeng
dc.peerreviewedyes
dc.subjectAltitude
dc.subjectAviation
dc.subjectGago Coutinho
dc.subjectHistory
dc.subjectNavigation
dc.subjectOceanography
dc.subjectOcean Engineering
dc.titleCoutinho's method for the altitudeen
dc.typejournal article
degois.publication.firstPage861
degois.publication.issue4
degois.publication.lastPage873
degois.publication.titleJournal of Navigation
degois.publication.volume73
dspace.entity.typePublication
rcaap.rightsopenAccess

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