Home > Keywords > Articles spéciaux > onglet

onglet

Articles

  • The historical French heritage
    14 December 2010, by Frank

    France 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 the (…)

  • About
    21 October 2022, by Médéric Gravelle

    The GNSS solution named ’GT3’ 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 319 permanent GNSS stations expressed in the ITRF2014 reference frame over the period January 1994 to December 2020. This GNSS solution was carried out within the framework of the 3rd IGS reanalysis (reprocessing) campaign (Repro3). Among the 319 stations processed by GFZ, as many as 272 have (…)

  • Download
    17 January 2020, by Médéric Gravelle

    – Vertical velocities table
    The JPL14_Vertical-Velocities_Table provides the vertical GPS velocities and uncertainties from the 436 stations fulfilling the criteria of 3 years of minimum length and data gaps not exceeding 30%, estimated by the JPL group.
    – Daily time series
    The JPL14.zip file contains individual station data files of daily position time series in ITRF2014 with respect to the position at the epoch 2023-01-01. These positions are expressed in meters in the local frame (…)

  • A propos
    27 janvier 2020, par Médéric Gravelle

    La solution GNSS ’JPL14’ est produite par l’équipe du Jet Propulsion Laboratory (JPL)en utilisant une stratégie de calcul PPP (Precise Point Positioning). Grâce au logiciel du JPL GipsyX, des séries temporelles de positions journalières sont fournies pour plus de 2,000 station distribuées globalement en utilisant les produits d’orbites et d’horloges du JPL exprimées dans le repère de référence IGS14. La solution couvre la période Janvier 1994 - Avril 2022 Cette stratégie d’analyse de (…)

  • 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

  • Not available yet
    21 February 2017, by Mikaël Guichard

    Work in progress...

  • Téléchargements
    28 août 2020, par Médéric Gravelle

    – Table des vitesses veticales
    La tabel GT2_Vertical-Velocities_Table contient les vitesses verticales et les incertitudes associées, calculées par l’équipe du GFZ, des 593 stations satisfaisant les critères de 3 ans minimum de longueur sans discontinuités, avec des "trous" n’excédant pas les 30%.
    – Séries temporelles journalières
    Le fichier GT2_neu.zip contient les séries temporelles individuelles dans l’ITRF2014 par rapport à l aposition à l’époque de référence. Les positions sont (…)

  • GNSS Data Providers
    6 January 2017, by Mikaël Guichard
  • Download
    7 October, by Médéric Gravelle

    – Vertical velocities table
    The NGL20_Vertical-Velocities_Table provides the vertical GPS velocities and uncertainties from the 1195 stations fulfilling the criteria of 3 years of minimum length and data gaps not exceeding 30%, estimated by the NGL group using MIDAS (Blewitt et al. 2016). Daily time series
    The NGL20.zip file contains individual station data files of the 1523 daily position time series in ITRF2020 with respect to the position at the mid time series epoch. These positions (…)

  • Download
    20 February 2017, by Mikaël Guichard

    The web map enables the users to navigate from one site (station) to another, and click on a specific site in the map to see its attributes. By clicking further, an individual web page for the site can be accessed, where details on the data and meta-data are displayed for that site. The user can then get some additional statistics and download files with the associated time series (sea level differences...). Here, we provide a more comprehensive means to download the data from all the sites. (…)