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Auteur A. Sudau |
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Untersuchungen zur Leistungsfähigkeit elektronischer Druckaufnehmer für präzise barometrische Höhenmessungen / A. Sudau (1994)
Titre : Untersuchungen zur Leistungsfähigkeit elektronischer Druckaufnehmer für präzise barometrische Höhenmessungen Titre original : [Etude de faisabilité d'un capteur électronique de pression pour un nivellement barométrique précis] Type de document : Thèse/HDR Auteurs : A. Sudau, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1994 Collection : DGK - C Sous-collection : Dissertationen num. 434 Importance : 142 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9477-2 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Nivellement
[Termes IGN] instrument de nivellement
[Termes IGN] nivellement barométriqueIndex. décimale : 30.03 Instruments de géodésie Résumé : (Auteur) Electronic pressure sensors are available since about a decade. The first results of a motorized barometric levelling with low cost sensors showed that these sensors already have the accuracy of Thommen-barome-ters. Therefore it can be expected that precise barometric levelling within an accuracy of 1-2 dm is possible by using precise pressure sensors. This requires a precision of the pressure measurements of some 1/1000 hPa.
At first an overview is given of the most important principles of electronic pressure measurement. Beside that the capacity of different sensor types is investigated. Based on the analysis of this data the Digiquartz-Transmitter PAROSCIENTIFIC 1015A was chosen for this researchwork.
In a lot of test measurements the sensor-specifications given by the producer could be verified and the influences on barometric levelling caused by the instrument are analysed. The results of the tests show that the PAROSCIENTIFIC-Transmitter is qualified for precise barometric levellings.
The use of precise instruments requires an analysis and development of the models for the determination of barometric levelling used until now. Different models of computing and adjusting barometric heights are discussed. Depending on the model used the barometric heights are handled as correlated observations. Without any more information the precision of the barometric heights can be estimated by using observa-tion differences. The consideration of geometric leveled heights offers the possibility to determine the trueness of the barometric heights.
Finally barometric measurements are executed for testing the PAROSCIENTIFIC-Transmitters and the developed theoretical models in practice. The results of these experiments show that it is possible to achieve an accuracy of the barometric heights of 0.07-0.16 m. Such accuracies cannot be achieved with conventional barometers because they are not able to detect a lot of important systematic influences on the measurements. This is only possible using a precise sensor in combination with the developed models.Numéro de notice : 28055 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63402 Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 28055-01 30.03 Livre Centre de documentation En réserve M-103 Disponible 28055-02 30.03 Livre Centre de documentation En réserve M-103 Disponible