In addition to its national scope with its specific aims associated with a national research observation infrastructure on sea level, SONEL plays the role of GNSS at tide gauge data assembly centre for the GLOSS programme since 2011 (see GLOSS Implementation Plan - 2012, pp. 23). SONEL is also the primary data centre for the GPS Tide Gauge Benchmark Monitoring (TIGA) pilot project, which has turned into a working group of the International GNSS Service (IGS) in 2010.
Consequently, (...)
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Role of SONEL
27 October 2011, by Guy Woppelmann -
Data access
14 February 2008, by Guy WoppelmannThe GPS observations are published on the anonymous FTP server of SONEL (ftp.sonel.org). The conditions of access are that the origin of the data is acknowledged in all communications, oral or written. Further details.
The FileZilla tool is a free client ftp which allows you to access the data. -
Download
21 October 2022, by Médéric Gravelle– Vertical velocities table
The GT3_Vertical-Velocities_Table provides the vertical GPS velocities and uncertainties from the 296 stations fulfilling the criteria of 3 years of minimum length and data gaps not exceeding 30%, estimated by the GFZ group.
– Daily time series
The GT3_neu.zip file contains individual station data files of daily position time series in ITRF2014 with respect to the position at the reference epoch. These positions are expressed in meters in the local frame (...) -
Résultats des mesures de contrôle
3 avril 2008, par Guy WoppelmannLes résultats des mesures de contrôles ’in situ’ sont directement intégrés dans les pages correspondants au marégraphe concerné. Les missions de contrôle font généralement l’objet d’un rapport dans lequel figure le résultat de l’exploitation des mesures d’étalonnage (diagramme de Van de Casteele). Voici un exemple : contrôle du marégraphe de Socoa (Saint Jean-de-Luz) en mai 2007.
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Téléchargements
27 janvier 2020, par Médéric Gravelle– Table des vitesses verticales
La table NGL14_Vertical-Velocities_Table contient les vitesses verticales GPS estimées par le groupe NGL en utilisant MIDAS, pour les 1069 stations satisfaisant les critères de 3 ans minimum de longueur avec des "trous" n’excédant pas les 30%.
– Séries temporelles journalières
Le fichier NGL14.zip contient les séries temporelles individuelles de positions des stations exprimées dans l’ITRF2014, calculées par le groupe NGL, par rapport à la position à (...) -
GNSS Data Providers
9 January 2017, by eprout01 -
Statistics
27 May 2022, by Médéric GravelleVertical velocity field Estimated (robust) velocities: 546 CGPS@TG 461 Average of formal errors: 0.38 mm/yr Median of formal errors: 0.28 mm/yr
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Statistiques
27 janvier 2020, par Médéric GravelleChamps de vitesse vertical Vitesses (robustes) estimées : 436 CGPS@TG 281 Moyenne des erreurs formelles : 0.42 mm/an Médiane des erreurs formelles : 0.32 mm/an
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The historical French heritage
14 December 2010, by FrankFrance is very rich in systematic observations of coastal sea level over long time periods. The oldest (published) series of measurements were performed by the astronomers La Hire and Picard at Brest, France, in 1679, over about ten days. They repeated the experiment in 1692, over several months, again in Brest. Their aim was to study the tides and their results showed the fundamental importance of observation to understand and determine the characteristics of tides in a given place for (...)
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About
8 January 2020, by Médéric GravelleThe GNSS solution named ’NGL14’ is produced by the Nevada Geodetic Laboratory (NGL) using a Precise Point Positioning (PPP) data analysis strategy. The GipsyX software (version 1.0) from the Jet Propulsion Laboratory (JPL) is employed to produce daily position time series for over 17,000 globally distributed stations using JPL satellite orbits and clock products expressed in the IGS14 reference frame (Blewitt et al. 2018). The data set covers the period January 1996 to March 2022. (...)