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A GNSS odometer: how far have we come? / Andreas Wieser in GPS world, vol 19 n° 4 (April 2008)

Public [article]  inGPS world > vol 19 n° 4 (April 2008) . - pp 50 - 55 Titre : A GNSS odometer: how far have we come? Type de document : Article/Communication Auteurs : Andreas Wieser, Auteur Année de publication : 2008 Article en page(s) : pp 50 - 55 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] écart type [Termes IGN] erreur systématique [Termes IGN] géonavigateur [Termes IGN] GPS assisté pour la navigation (technologies) [Termes IGN] Matlab [Termes IGN] odomètre [Termes IGN] positionnement par GNSS [Termes IGN] précision des mesures Résumé : (Editeur) [...] The odometer was likely first invented by Archimides during the First Punic War when Syracuse got in the way of Rome during its battle with Carthage. A Greek origin is fitting as the word odometer derives from the Greek words hodos, meaning "path" or "way" and matron, meaning "measure," The device was reinvented many times over the years but its use was not widespread until the development of the automobile, and now virtually every vehicle sports one. Mechanical odometers gave way to electronic ones but the distance travelled was and is still determined by counting wheel revolutions. But just how accurate are the odometers in our modern vehicles? Not very, it seems. The odometer reading is affected by tire pressure, tire slip, and incorrect calibration. And while in many countries there is no regulation covering odometer accuracy, the Society of Automotive Engineers' voluntary standard and that of the European Commission is only plus or minus 4 percent, or as much as a 4-kilometer error in every 100 km. Does this matter? Well, in effort to reduce the cost to the general tax payer of maintaining roads or reducing congestion, many administrations have implemented "road pricing," where a flat charge is levied for using a particular stretch of road or for entering a city center. But some administrations are charging per kilometer of travel with data coming from an odometer recording. Automobile insurance companies have also implemented plans where the premium is based on the distance travelled by the vehicle ("pay as you drive"). To fairly implement such schemes, governments should require more accurate odometers in vehicles. Could an odometer based on GNSS be a solution? In this month's column, we take a look at how distance travelled can be computed from GNSS observations and just how accurate those computations are. Copyright Questex Media Group Inc Numéro de notice : A2008-163 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29158 [article]

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