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    Author(s): Katie M. Moriarty; Clinton W. Epps
    Date: 2015
    Source: Wildlife Society Bulletin
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: Download Publication  (269.0 KB)


    Global Positioning System (GPS) units used in animal telemetry often suffer from nonrandom data loss and location error. GPS units use stored satellite information to estimate locations, including almanac and ephemeris data reflecting satellite positions at weekly and at <4-hr temporal scales, respectively. Using the smallest GPS collars (45–51 g) available for mammals, we evaluate how satellite information and environmental conditions affected GPS performance in 27 mobile trials, and field reliability during 56 deployments on Pacific marten (Martes caurina).

    Publication Notes

    • Visit PNW's Publication Request Page to request a hard copy of this publication.
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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Moriarty, Katie M.; Epps, Clinton W. 2015. Retained satellite information influences performance of GPS devices in a forested ecosystem. Wildlife Society Bulletin. 39(2): 349-357.


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    animal movement, carnivore, fix success, GPS, location error, Martes americana, Martes caurina, Telemetry Solutions.

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