title: Global Positioning System (GPS) location accuracy improvement due to selective availability removal.
abstract: Global Positioning System (GPS) is an important new technology for spatio-temporal behaviour studies of animals. Differential correction improves location accuracy. Previously, it mostly removed partially the influence of Selective Availability (SA). SA was deactivated in May 2000. The aim of this study was to quantify the influence of SA cancellation on location accuracy of various GPS receivers. We tested the accuracy of locations obtained from non-differential and differential GPS animal collars before and after SA removal. We found a significant improvement in accuracy for both types of GPS collars. However, differential GPS still provides more accurate locations.
authors: Institut de recherche sur les grands mammifères, Institut national de la recherche agronomique, BP 27, 31326 Castanet-Tolosan, France. cadrados@toulouse.inra.fr
authors: Christophe
authors: C
authors: Adrados
authors: Irène
authors: I
authors: Girard
authors: Jean-Paul
authors: JP
authors: Gendner
authors: Georges
authors: G
authors: Janeau
mesh_terms: D000823:Animal Identification Systems / Q000191:economics / Q000295:instrumentation*; D025041:Animal Migration; D000818:Animals; D000835:Animals, Wild / Q000502:physiology; D004867:Equipment Design; D005010:Ethology / Q000191:economics / Q000295:instrumentation*; D005106:Exploratory Behavior; D018531:Spacecraft; D013037:Spatial Behavior