Bias and precision of different sampling methods for GPS positions

Arnaud Michel, Flori Albert. 1998. Bias and precision of different sampling methods for GPS positions. Photogrammetric Engineering and Remote Sensing, 64 (6) : 597-600.

Autre titre : Biais et précision des différentes méthodes d'échantillonnage pour les positions GPS (Système de Positionnement Global)

Résumé : Based on GPS readings taken four mornings running, this article uses statistical methods, taking account of observation dependence, to study bias and variance of errors. It is shown that with or without filtering based on criteria such as the number of satellites or PDOP, mean longitude and latitude values are unbiased. In the experiment carried out, filtering was used to improve the precision of longitude readings, but had a lesser effect on latitude. However, filtering can cause long delays before obtaining a reading. Replicating readings can increase their precision, provided certain operating conditions are respected.

Mots-clés Agrovoc : échantillonnage, méthode, mesure (activité), système de positionnement global, télédétection

Classification Agris : U30 - Méthodes de recherche
U10 - Informatique, mathématiques et statistiques

Auteurs et affiliations

• Arnaud Michel, CIRAD-TERA-ERE (FRA)
• Flori Albert, CIRAD-CP-DIR (FRA) ORCID: 0000-0002-6962-5792

Source : Cirad - Agritrop (https://agritrop.cirad.fr/390122/)

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