Centre de documentation
scientifique

The effect of tropospheric delay on GPS height differences along the Equator / J. Dodo in SaLIS Surveying and land information science, vol 68 n° 3 (September 2008)

Public [article]  inSaLIS Surveying and land information science > vol 68 n° 3 (September 2008) . - pp 145 - 154 Titre : The effect of tropospheric delay on GPS height differences along the Equator Type de document : Article/Communication Auteurs : J. Dodo, Auteur ; M. Kamarudin, Auteur ; M. Yahya, Auteur Année de publication : 2008 Article en page(s) : pp 145 - 154 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Nivellement [Termes IGN] antenne GPS [Termes IGN] correction du signal [Termes IGN] équateur (géodésie) [Termes IGN] erreur systématique [Termes IGN] GPS en mode cinématique [Termes IGN] hauteur ellipsoïdale [Termes IGN] Malaisie [Termes IGN] nivellement par GPS [Termes IGN] positionnement cinématique en temps réel [Termes IGN] propagation troposphérique [Termes IGN] zone équatoriale Résumé : (Auteur) The fundamental issue in GPS positioning is the ability to mitigate all the potential errors and biases in the system. The atmosphere related errors of ionosphere and troposphere constitute one of these potential errors. The tropospheric effect is much more pronounced at the equatorial region due to its hot and wet conditions. This significantly affects the GPS signal due to the variability of the refractive index, which in turn affects the accuracy of GPS positioning, especially in the height components. This paper presents a study conducted in Malaysia located at the equatorial region, to investigate the impact of tropospheric delay on GPS height variation. Five GPS reference stations forming part of the Malaysian real-time kinematic GPS network (MyRTKnet) in Johor were used. RINEX data from these stations were integrated with GPS and ground meteorological data observed from a GPS station located at the Universiti Teknologi Malaysia (UTM), at varying antenna heights for each session of observation in four campaigns with each campaign lasting for three days. A computer program called TROPO.exe was developed based on Saastamoinen tropospheric model. The result shows variations in the height component of GPS measurement with a maximum value of 119.100 cm and a minimum value of 37.990 cm. Similarly, the results show that the tropospheric delay is a distance-dependent error which varies with changes in meteorological condition. Furthermore, the results of simulated data show a decrease in tropospheric delay with increase in antenna height. Copyright SaLIS Numéro de notice : A2008-411 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83665 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
121-08031	RAB	Revue	Centre de documentation	En réserve L003	Disponible