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Microsoft's proposed take-over of Vexcel, part of a global heavyweight struggle / Gordon Petrie in Geoinformatics, vol 9 n° 3 (01/05/2006)

Public [article]  inGeoinformatics > vol 9 n° 3 (01/05/2006) . - pp 6 - 11 Titre : Microsoft's proposed take-over of Vexcel, part of a global heavyweight struggle Type de document : Article/Communication Auteurs : Gordon Petrie, Auteur Année de publication : 2006 Article en page(s) : pp 6 - 11 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] acquisition d'images [Termes IGN] entreprise [Termes IGN] logiciel de photogrammétrie [Termes IGN] matériel informatique [Termes IGN] prise de vue aérienne [Termes IGN] prise de vue spatiale [Termes IGN] visualisation 3D Résumé : (Auteur) The news that the Microsoft Corporation is in the process of trying to acquire the Vexcel Corporation was first reported on 15th march 2006 by Daily Camera, a local newsparer published in Vexcel's home town of Boulder, Colorado. Somewhat belatedly, this leaked news was confirmed by spokesmen for Microsoft and Vexcel a day or two later. All of which triggered an outpouring of comment on numerous Web sites from Microsoft "watchers" and "bloggers". It was only too apparent from the published comments that many of these "bloggers" simply have little or no idea as to what Vexcel does and why it should be attractive to Microsoft. So the publisher invited me to supply my own thoughts opinions on the matter of this projected take-over of Vexcel. It is very much a personal viewpoint ! Copyright Geoinformatics. Numéro de notice : A2006-199 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27926 [article]

GNSS update, launch of new GNSS receivers and chipsets / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 3 (01/05/2006)

Public [article]  inGeoinformatics > vol 9 n° 3 (01/05/2006) . - pp 20 - 21 Titre : GNSS update, launch of new GNSS receivers and chipsets Type de document : Article/Communication Auteurs : Huibert-Jan Lekkerkerk, Auteur Année de publication : 2006 Article en page(s) : pp 20 - 21 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] Global Navigation Satellite System [Termes IGN] précision du positionnement [Termes IGN] récepteur GNSS [Termes IGN] signal GPS [Termes IGN] système de positionnement par satellites Résumé : (Auteur) At the moment GNSS product manufacturers are busy developing new products. Chipsets are becoming available that are capable of receiveing signals from all three GNSS systems. Furthermore, the production of chipsets for the new GPS frequencies is coming up to speed. But the development of GNSS systems themselves is not rest either. One fact is that GPS has become ten to fifteen percent more precise over the last few months. Copyright Geoinformatics. Numéro de notice : A2006-200 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27927 [article]

Practical satellite navigation: part 3 error sources / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 3 (01/05/2006)

Public [article]  inGeoinformatics > vol 9 n° 3 (01/05/2006) . - pp 48 - 50 Titre : Practical satellite navigation: part 3 error sources Type de document : Article/Communication Auteurs : Huibert-Jan Lekkerkerk, Auteur Année de publication : 2006 Article en page(s) : pp 48 - 50 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] affaiblissement de la précision [Termes IGN] champ gravifique [Termes IGN] contrôle qualité [Termes IGN] effet atmosphérique [Termes IGN] erreur systématique [Termes IGN] ionosphère [Termes IGN] positionnement par GPS [Termes IGN] source d'erreur [Termes IGN] trajet multiple [Termes IGN] troposphère Résumé : (Auteur) In the previous articles the position determination of GPS was discussed. The GPS position, based on the C/A code, nowadays has a precision of approximately 5-20 meters. With the P code, more precise results can be achieved (1-5 meters). The difference in precision between C/A and P code is largely due to the length of the code and the broadcasting of the P code on two frequencies. There are however a number of error sources that influence the precision of the GPS position and which can degrade the position with meters. This article will give a brief overview of a number of large errors sources that can influence the position determination. Copyright Geoinformatics. Numéro de notice : A2006-201 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27928 [article]

Voir aussi

• Practical satellite navigation: part 2 GPS position and time determination / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 2 (01/03/2006)
• Practical satellite navigation: part 4 differential GPS systems and RTK techniques / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 4 (01/06/2006)