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Título

Accuracy of Lightweight Satellite Telemetry: a Case Study in the Iberian Peninsula

AutorSoutullo, Álvaro; Cadahía, Luis CSIC; Urios, Vicente; Ferrer, Miguel CSIC ; Negro, Juan J. CSIC ORCID
Palabras claveAccuracy
Argos
error
Europe
Platform
Transmitter Terminal
satellite telemetry
satellite tracking
Fecha de publicación2007
EditorWildlife Society
CitaciónJournal of Wildlife Management, 71(3):1010-1015. 2007.
ResumenHere we provide the first assessment of the accuracy of lightweight satellite transmitters (,80 g) under actual operating conditions and the performance of the Argos system in southern Europe. To estimate transmitter accuracy we used transmitters equipped with a Global Positioning System (GPS) and compared the location estimates provided by Argos with the estimates provided by the GPS. Using the 68th percentile to define the accuracy of locations estimates, observed accuracy was 4 km for Location Class (LC) 1, 15 km for LC 0, 20 km for LC A, and 59 km for LC B, which is in line with estimates reported by other authors. Yet, the error of the remaining 32% of the data ranged between 4 km and 11 km, 15 km and 217 km, 20 km and 145 km, and 59 km and 493 km, respectively, suggesting that using the 68th percentile to estimate accuracies might give misleading confidence on the accuracy of location estimates. Using the 90th percentile is probably more appropriate. Less than 10% of the locations we obtained corresponded to the more accurate LCs (3, 2, and 1), with Argos failing to provide a position estimate in 45% of the attempts. The low number of high-quality location estimates is likely a consequence of the electromagnetic interference reported for our study area, rather than a defect of the Platform Transmitter Terminals (PTTs), which under good conditions of signal reception seem to be as reliable as heavier ones. The recent advent of lightweight GPS transmitters overrides most of these problems. Yet, whereas the smallest Argos-GPS PTTs weigh 30 g, which restricts their use to animals weighting .1,000 g, conventional PTTs can be as small as 9.5 g, allowing their use with animals weighting 250–300 g. ( JOURNAL OF WILDLIFE MANAGEMENT 71(3):1010– 1015; 2007)
Versión del editorhttp://www.bioone.org/doi/pdf/10.2193/2006-042
URIhttp://hdl.handle.net/10261/38971
DOI10.2193/2006-042
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