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GPS, GLONASS, and more: multiple constellation processing in the International GNSS Service / Tim A. Springer in GPS world, vol 21 n° 6 (June 2010)

Public [article]  inGPS world > vol 21 n° 6 (June 2010) . - pp 48 - 58 Titre : GPS, GLONASS, and more: multiple constellation processing in the International GNSS Service Type de document : Article/Communication Auteurs : Tim A. Springer, Auteur ; Rolf Dach, Auteur Année de publication : 2010 Article en page(s) : pp 48 - 58 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] positionnement par GLONASS [Termes IGN] positionnement par GPS [Termes IGN] récepteur GNSS [Termes IGN] traitement de données GNSS Résumé : (Editeur) [....] Standing for Global'naya Navigatsionnaya Sputnikova Sistema, GLONASS was conceived by the former Soviet Ministry of Defence in the 1970s, perhaps as a response to the announced development of GPS. The first satellite was launched on October 12, 1982. But because of launch failures and the characteristically brief lives of the satellites, a further 70 satellites were launched before a fully populated constellation of 24 functioning satellites was achieved in early 1996. Unfortunately, the full constellation was short-lived. Russia's economic difficulties following the dismantling of the Soviet Union hurt GLONASS. Funds were not available, and by 2002 the constellation had dropped to as few as seven satellites, with only six available during maintenance operations! But Russia's fortunes turned around, and with support from the Russian hierarchy, GLONASS was reborn. Longer-lived satellites were launched, as many as six per year, and slowly but surely the constellation has grown to 21, with two in-orbit spares. But are there any users outside Russia? Although dual-system GPS/ GLONASS receivers have been around for at least a decade, manufacturers have taken notice of GLONASS's recent phoenix-like rebirth. All of the high-end manufacturers now offer receivers with GLONASS capability. Does combining GPS and GLONASS observations make a difference? You bet just ask any surveyor who uses both systems in the real-time kinematic (RTK) approach. Scientific applications requiring high-accuracy satellite orbit and clock data also benefit.The International GNSS Service (IGS) has been providing such data for several years, and in this month's article representatives from two IGS analysis centers discuss the past, present, and future of IGS GNSS monitoring and product development. So, getting back to our question, are we there yet? Many early adopters of GPS plus GLONASS data and products would reply with a resounding "yes." Numéro de notice : A2010-237 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30431 [article]

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