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Geodetic dual-frequency GPS receivers under anti-spoofing / P.G. Sluiter (1995)

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Titre :	Geodetic dual-frequency GPS receivers under anti-spoofing : comparison of four receivers for baseline accuracy susceptibility to radio frequency interference noise in the observables : a project of the working group for applied space geodesy
Type de document :	Rapport
Auteurs :	P.G. Sluiter, Auteur
Editeur :	Delft : Netherlands Geodetic Commission NGC
Année de publication :	1995
Collection :	Netherlands Geodetic Commission Publications on Geodesy
Sous-collection :	New series num. 42
Importance :	89 p.
Format :	21 x 30 cm
ISBN/ISSN/EAN :	978-90-6132-255-9
Note générale :	Bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Géodésie spatiale [Termes IGN] analyse comparative [Termes IGN] anti-leurrage [Termes IGN] base géodésique [Termes IGN] Bernese [Termes IGN] bruit (théorie du signal) [Termes IGN] interférence [Termes IGN] précision des mesures [Termes IGN] récepteur GPS
Index. décimale :	30.03 Instruments de géodésie
Résumé :	(Auteur) On 31 January 1994, the Anti-Spoofing (AS) feature was activated by the GPS control segment. This restricts the capabilities of conventional two-frequency GPS receivers. Several manufacturers of geodetic receivers have developed methods to overcome most of the adverse effects of AS. The Working Group for Applied Space Geodesy of the Netherlands Geodetic Commission, (an institute of the Royal Netherlands Academy of Arts and Sciences) decided to investigate and compare the performance of four of these receivers, i.e. the ASHTECHZ-12, the LEICA (or WILD) System 200, Alien Osborme Associates' TurboRogue (SNR8000) and the TRIMBLE 400OSSE. Major attention was given to the ability to accurately and quickly resolve two baselines; one of 10 km and one of 100km length. Furthermore, the susceptibility to radio frequency interference (RFI) was investigated, mainly because in the past years this has on several occasions been a problem during surveys in Holland. And finally an effort has been made to determine the noise in the various observables that are output by the receivers. We stress that this is not a comprehensive evaluation to be used to decide on which receiver to purchase. For that purpose many other aspects should be taken into account, such as performance under low signal levels (foliage), availability of software and peripheral modules to integrate GPS into normal survey operations, weight, transportability, kinematic operation, price and other aspects for specialized applications. Some guidance to the reading of this report may be useful. Individual chapters of the report can mostly be read separately, though some aspects overlap. The most important results are always included in the text, often with short tables. More detailed tables or figures are -grouped per chapter- included in the appendices. Chapter 1 is an introduction, mainly consisting of a short explanation on AS and how the various manufacturers try to overcome its restrictions. In it, the rationale is given why we choose to evaluate the aspects as described. Chapter 2 describes the data acquisition for the evaluation of baselines and the noise in various observables. Chapter 3 gives the results of "hands-off" processing of baselines, using the standard provided by the manufacturers and a commercially available receiver-independent package, i.e. TOPAS from TerraSat, recently renamed into GEOTRACER from the compagny Geotronics. The guiding principle in this chapter is that no efforts have been to improve the results by means of data editing or any other method. Chapter 4 gives the results of processing with the scientific "Bernese" software package. Here extensive efforts have beer made to get the best out of the available data. Chapter 5 describes the effects of both unintentional and intentional radio frequency interrference (RFI) on the performance. Chapter 6 explains efforts to analyse the noise in the various observables, using one single receiver per manufacturer. Results are given. Chapter 7 contains the most important conclusions. More detailed conclusions are given at the end of chapter 3, 4, 5 and 6.
Numéro de notice :	63965
Affiliation des auteurs :	non IGN
Thématique :	POSITIONNEMENT
Nature :	Rapport
DOI :	sans
En ligne :	https://www.ncgeo.nl/downloads/42Sluiter.pdf
Format de la ressource électronique :	URL
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=61243

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
63965-02	30.03	Livre	Centre de documentation	En réserve M-103	Disponible
63965-01	30.03	Livre	Centre de documentation	En réserve M-103	Disponible

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