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Precision on board : orbit determination of LEO satellites with real-time corrections / André Hauschild in GPS world, vol 28 n° 4 (April 2017)

Public [article]  inGPS world > vol 28 n° 4 (April 2017) . - pp 42 - 47 Titre : Precision on board : orbit determination of LEO satellites with real-time corrections Type de document : Article/Communication Auteurs : André Hauschild, Auteur ; Javier Tegedor, Auteur ; Oliver Montenbruck, Auteur ; et al., Auteur Année de publication : 2017 Article en page(s) : pp 42 - 47 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Techniques orbitales [Termes IGN] éphémérides de satellite [Termes IGN] orbite basse [Termes IGN] orbitographie [Termes IGN] précision du positionnement [Termes IGN] simulation [Termes IGN] temps réel Résumé : (Auteur) Precise point positioning (PPP) with real-time orbit and clock correction streams has become an established technique over the past decade. Several free as well as commercial sources of precise correction streams are available through the internet or via a satellite link to geostationary satellites. Many applications exist for land, air and sea applications, but use of real-time corrections for precise positioning has not extended into orbit yet, although a number of low Earth orbit (LEO) satellite missions have a demand for precise orbit determination (POD). Mission requirements often allow for a relatively high latency for the availability of the precise orbit products, thus ground-based, near-real-time processing is sufficient. However, future satellites with altimeter and radio-occultation payloads may require real-time POD to enable onboard processing of science data for short-term forecasting or now-casting of meteorology data, open-loop instrument operations of radar payloads, or quick-look onboard science data generation. Also, precise real-time orbit information may be used for constellation maintenance of satellite formations. Despite early technology readiness demonstrations by the Jet Propulsion Laboratory carried out one decade ago to transmit real-time corrections via geostationary relay satellites to LEO spacecraft, this technique has so far not been implemented and used in a space mission. Numéro de notice : A2017-292 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85327 [article]

A study on the dependency of GNSS pseudorange biases on correlator spacing / André Hauschild in GPS solutions, vol 20 n° 2 (April 2016)  

Public [article]  inGPS solutions > vol 20 n° 2 (April 2016) . - pp 159 - 171 Titre : A study on the dependency of GNSS pseudorange biases on correlator spacing Type de document : Article/Communication Auteurs : André Hauschild, Auteur ; Oliver Montenbruck, Auteur Année de publication : 2016 Article en page(s) : pp 159 - 171 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] correction du trajet multiple [Termes IGN] corrélation [Termes IGN] erreur systématique [Termes IGN] mesurage de pseudo-distance [Termes IGN] mitigation [Termes IGN] puce [Termes IGN] récepteur GNSS [Termes IGN] signal GNSS [Vedettes matières IGN] Traitement de données GNSS Résumé : (Auteur) We provide a comprehensive overview of pseudorange biases and their dependency on receiver front-end bandwidth and correlator design. Differences in the chip shape distortions among GNSS satellites are the cause of individual pseudorange biases. The different biases must be corrected for in a number of applications, such as positioning with mixed signals or PPP with ambiguity resolution. Current state-of-the-art is to split the pseudorange bias into a receiver- and a satellite-dependent part. As soon as different receivers with different front-end bandwidths or correlator designs are involved, the satellite biases differ between the receivers and this separation is no longer practicable. A test with a special receiver firmware, which allows tracking a satellite with a range of different correlator spacings, has been conducted with live signals as well as a signal simulator. In addition, the variability of satellite biases is assessed through zero-baseline tests with different GNSS receivers using live satellite signals. The receivers are operated with different settings for multipath mitigation, and the changes in the satellite-dependent biases depending on the receivers’ configuration are observed. Numéro de notice : A2016-610 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1007/s10291-014-0426-0 En ligne : http://dx.doi.org/10.1007/s10291-014-0426-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81807 [article]

First Galileo FOC satellite on the air: Will be employable for surveying, precise positionning, and geodesy / Peter Steingenberger in GPS world, vol 26 n° 1 (January 2015)  

Public [article]  inGPS world > vol 26 n° 1 (January 2015) . - pp 8 -13 Titre : First Galileo FOC satellite on the air: Will be employable for surveying, precise positionning, and geodesy Type de document : Article/Communication Auteurs : Peter Steingenberger, Auteur ; André Hauschild, Auteur Année de publication : 2015 Article en page(s) : pp 8 -13 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] positionnement par Galileo [Termes IGN] positionnement par GNSS [Termes IGN] signal Galileo Index. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur ) [introduction] The first Full Operational Capability (FOC) Galileo satellite started transmitting L-band navigation signals on november 29, 2014. Numéro de notice : A2015-002 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://gpsworld.com/first-galileo-foc-satellite-on-the-air/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74883 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
067-2015011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

CONGO: First GPS/GIOVE tracking network for science, research / Oliver Montenbruck in GPS world, vol 20 n° 9 (September 2009)

Public [article]  inGPS world > vol 20 n° 9 (September 2009) . - 7 p. ; pp 56 - 62 Titre : CONGO: First GPS/GIOVE tracking network for science, research Type de document : Article/Communication Auteurs : Oliver Montenbruck, Auteur ; André Hauschild, Auteur ; U. Hessels, Auteur ; Peter Steigenberger, Auteur ; Urs Hugentobler, Auteur Année de publication : 2009 Article en page(s) : 7 p. ; pp 56 - 62 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] récepteur GNSS [Termes IGN] station de poursuite Résumé : (Auteur)/d'éditeur : Selected results from the COoperative Network for GIOVE Observation (CONGO) demonstrate how the global network provides early familiarization with the new Galileo signals and access to precise GIOVE orbit and clock information, to develop new processing techniques for multi-constellation, multi-frequency GNSS. Initial results from CONGO, the first network of GNSS receivers for scientific applications offering combined GPS and GIOVE tracking on a continuous and global level, demonstrate orbit determination of the GIOVE satellites at an accuracy level of 1 meter. The resulting products will enable a combined positioning using GPS/GIOVE or GPS/GLONASS/GIOVE measurements now provided by the latest geodetic GNSS receivers. The generation of real-time orbit and clock products is under development. They will help to bridge gaps in the availability of broadcast ephemerides and will enable continuous navigation with the GIOVE satellites. In the next year, at least two new stations will be added to the CONGO network. This will further enhance robustness and improve overall quality of network products. Copyright Questex Media Group Numéro de notice : A2009-349 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29979 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
067-09091	SL	Revue	Centre de documentation	Revues en salle	Disponible