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Re: Local GPS

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  • Re: Local GPS

    > Are there in fact "local" gps that can be set up with
    > a transmitter and reciviers in the lab? How accurate?

    Inpossible in the lab: a direct access to satellites is needed.
    Accuracy: Normal GPS: 20m (Thank you, Bill ;-))
    Standard Differential GPS (code mode, standard
    receivers): 2-5m
    High Precision Differential GPS (phase mode,
    professional recivers): 1-2cm,
    10-20 positions per second

    > If so, are there packages commercially available with
    > small devices as well as all of the software (PC-NT)
    > needed to use them

    High accuracy = 3-4kg ! Usally, professional GPS are available with
    softwares to compute position from raw data recorded by the receivers.

    Some articles from our lab:

    Perrin, O., Terrier, P., Ladetto, Q., Merminod, B. and Schutz, Y.
    Improvement of walking speed prediction by accelerometry and altimetry,
    validated by DGPS.
    Medical and Biological Engineering and Computing, 38, 164-168, 2000

    Schutz Y, Herren R.
    Assessment of speed of human locomotion using a differential satellite
    global positioning system.
    Med Sci Sports Exerc. 2000 Mar;32(3):642-6.

    Schutz Y, Chambaz A.
    Could a satellite-based navigation system (GPS) be used to assess the
    physical activity of individuals on earth?
    Eur J Clin Nutr. 1997 May;51(5):338-9.

    And from congress proceedings:

    Terrier P, Q. Ladetto, B. Merminod and Y. Schutz.
    High precision satellite positioning system as a new tool to study the
    biomechanics of human locomotion. GCMA 2000, Rochester
    Gait Posture. 11: 152-153, 2000.

    Ladetto, Q., B. Merminod, P. Terrier and Y. Schutz.
    On foot navigation: When GPS alone is not enough, GNSS99, Genova (it) 5-8
    October 1999, p.443-449.

    Philippe Terrier, Insitut de Physiologie, Lausanne, Suisse

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