onglet

Articles

• Statistiques
  27 janvier 2020, par Médéric Gravelle

  Champs de vitesse vertical Vitesses (robustes) estimées : 1069 CGPS@TG 872 Moyenne des erreurs formelles : 0.83 mm/an Médiane des erreurs formelles : 0.67 mm/an

• Statistics
  17 January 2020, by Médéric Gravelle

  Vertical velocity field Estimated (robust) velocities: 436 CGPS@TG 281 Average of formal errors: 0.42 mm/yr Median of formal errors: 0.32 mm/yr

• Statistiques
  17 octobre 2013, par eprout01

  Ce graphe montre l’évolution du nombre de fichiers Rinex disponibles sur SONEL (par DOY) depuis 1990-079

• About
  25 August 2020, by Médéric Gravelle

  The GNSS solution named ’GT2’ is produced by the German Research Centre for Geosciences (GFZ) for the International GNSS Service (IGS) working group TIGA. It contains position time series for 757 permanent GNSS stations expressed in the ITRF2014 reference frame over the period January 1994 to December 2015. This GNSS solution was carried out within the framework of the 2nd IGS reanalysis (reprocessing) campaign (Repro2). Among the 757 stations processed by GFZ, as many as 538 have (…)

• Statistics
  27 May 2022, by Médéric Gravelle

  Vertical 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

• About
  17 January 2020, by Médéric Gravelle

  The GNSS solution named ’JPL14’ is produced by the Jet Propulsion Laboratory (JPL) group using a Precise Point Positioning (PPP) data analysis strategy. JPL’s GipsyX software is employed to produce daily position time series for over 2,000 globally distributed stations using JPL satellite orbits and clock products expressed in the IGS14 reference frame. The data set covers the period January 1994 to April 2022. This GNSS data analysis strategy complies with the standards (models, (…)

• About
  13 September 2013, by Mikaël Guichard

  – Relative sea level trends: The relative sea level trends have been estimated by the PSMSL from the RLR tide gauge dataset of annual times series longer than 30 years with more than 70% of valid data. Only results from tide gauges for which a robust GPS velocity is available are displayed. (More about the PSMSL relative sea level trends). Absolute sea level trends: The absolute (geocentric) sea level trends build upon the above-mentioned relative sea level trends by simply adding the (…)

• Download
  25 August 2020, by Médéric Gravelle

  – Vertical velocities table
  The GT2_Vertical-Velocities_Table provides the vertical GPS velocities and uncertainties from the 593 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 GT2_neu.zip file contains individual station data files of daily position time series in ITRF2014 with respect to the position at the mid time series epoch. These positions are expressed in meters in the local (…)

• Statistics
  4 March 2020, by Médéric Gravelle

  General Analysis center: ULR Number of stations: 674 Solution: ULR6B CGPS@TG 482 Date of publication: 2020 Reference Frame 194 Time span: 1995.0 - 2013.9 Others 77 Reference Frame: ITRF 2014
  Vertical velocity field Estimated (robust) velocities: 493 CGPS@TG 349 Average of formal errors: 0.54 mm/yr Median of formal errors: 0.36 mm/yr

• Quelles observations ?
  16 février 2011, par Guy Woppelmann

  Les observations des marégraphes sont des hauteurs du niveau de la mer exprimées par rapport à un plan de référence arbitraire (conventionnel) et local. A ce titre, on parle de mesures relatives du niveau de la mer (par rapport à la côte sur laquelle repose le marégraphe).
  Les hauteurs du niveau de la mer disponibles sur SONEL sont : des hauteurs de niveau moyen de la mer journalier obtenues en appliquant différents filtres de la marée (ex. Doodson, Demerliac) ; des hauteurs de niveau (…)