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Integrated precipitable water from GPS observations and cimel sunphotometer measurements at CGO Belsk / Michal Kruczyk in Reports on geodesy and geoinformatics, vol 103 n° 1 (June 2017)  

Public [article]  inReports on geodesy and geoinformatics > vol 103 n° 1 (June 2017) . - pp 46 - 65 Titre : Integrated precipitable water from GPS observations and cimel sunphotometer measurements at CGO Belsk Type de document : Article/Communication Auteurs : Michal Kruczyk, Auteur ; Tomasz Liwosz, Auteur ; Aleksander Pietruczuk, Auteur Année de publication : 2017 Article en page(s) : pp 46 - 65 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] analyse comparative [Termes IGN] données météorologiques [Termes IGN] erreur systématique [Termes IGN] photomètre [Termes IGN] Pologne [Termes IGN] réseau permanent EUREF [Termes IGN] retard troposphérique [Termes IGN] teneur intégrée en vapeur d'eau Résumé : (auteur) This paper describes results of integrated precipitable water co-located measurements from two techniques: GPS solution and CIMEL-318 sunphotometer. Integrated Precipitable Water (IPW) is an important meteorological parameter and is derived from GPS tropospheric solutions for GPS station at Central Geophysical Observatory (CGO), Polish Academy of Sciences (PAS), Belsk and compared with sunphotometer (CIMEL-318 device by Cimel Electronique) data provided by Aerosol Robotic Network (AERONET). Two dedicated and independent GPS solutions: network solution in the sub-network of European Permanent Network (EPN) and precise point positioning solution have been made to obtain tropospheric delays. The quality of dedicated tropospheric solutions has been verified by comparison with EPN tropospheric combined product. Several IPW comparisons and analyses revealed systematic difference between techniques (difference RMS is over 1 mm). IPW bias changes with season: annual close to 1 mm IPW (and semi-annual term also present). IPW bias is a function of atmospheric temperature. Probable cause of this systematic deficiency in solar photometry as IPW retrieval technique is a change of optical filter characteristics in CIMEL. Numéro de notice : A2017-574 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/rgg-2017-0005 En ligne : https://doi.org/10.1515/rgg-2017-0005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86699 [article]

Verification of the polish geodetic reference frame by means of a new solution based on permanent GNSS data from the years 2011-2014 / Tomasz Liwosz in Reports on geodesy and geoinformatics, vol 102 n° 1 (December 2016)  

Public [article]  inReports on geodesy and geoinformatics > vol 102 n° 1 (December 2016) . - pp 52 - 66 Titre : Verification of the polish geodetic reference frame by means of a new solution based on permanent GNSS data from the years 2011-2014 Type de document : Article/Communication Auteurs : Tomasz Liwosz, Auteur ; M. Ryczywolski, Auteur Année de publication : 2016 Article en page(s) : pp 52 - 66 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] Bernese [Termes IGN] coordonnées GNSS [Termes IGN] European Terrestrial Reference Frame [Termes IGN] Pologne [Termes IGN] repère de référence [Termes IGN] réseau de premier ordre [Termes IGN] station permanente Résumé : (Auteur) The new solution for the Polish geodetic primary GNSS network was created to verify the currently used reference frame (PL-ETRF2000). The new solution is based on more GNSS data (more daily observation sessions included, a longer data timespan, GLONASS observations added) which were processed in a newer reference frame (IGb08) according to up-to-date methodology and using the latest version of Bernese GNSS Software. The new long-term solution (spanning 3.7 years) was aligned to the IGb08 reference frame using a minimum constraints approach. We categorized Polish reference stations into two categories according to their data length. We obtained good agreement of the new solution with the PL-ETRF2000: for most stations position differences did not exceed 5 mm in horizontal, and 10 mm in vertical components. However, for 30 stations we observed discontinuities in position time series, mostly due to GNSS equipment changes, which occured after the introduction of PL-ETRF2000. Position changes due to the discontinuities reached 9.1 mm in horizontal components, and 26.9 mm in vertical components. The new solution takes into account position discontinuities, and in addition also includes six new stations which were installed after the introduction of the PL-ETRF2000. Therefore, we propose to update the currently-used reference frame for the Polish geodetic primary network (PL-ETRF2000) with the new solution. The new solution was also accepted by the EUREF Technical Working Group as a class A solution (highest accuracy) according to EUREF standards. Numéro de notice : A2017-302 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/rgg-2016-0027 En ligne : https://doi.org/10.1515/rgg-2016-0027 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85337 [article]

Assessment of continental hydrosphere loading using GNSS measurements / Michał Zygmunt in Reports on geodesy and geoinformatics, vol 101 (June 2016)  

Public [article]  inReports on geodesy and geoinformatics > vol 101 (June 2016) . - pp 36 - 53 Titre : Assessment of continental hydrosphere loading using GNSS measurements Type de document : Article/Communication Auteurs : Michał Zygmunt, Auteur ; Marcin Rajner, Auteur ; Tomasz Liwosz, Auteur Année de publication : 2016 Article en page(s) : pp 36 - 53 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] déformation de la croute terrestre [Termes IGN] déformation verticale de la croute terrestre [Termes IGN] données GNSS [Termes IGN] fonction de Green [Termes IGN] modèle hydrographique [Termes IGN] série temporelle [Termes IGN] station permanente [Termes IGN] surcharge océanique Résumé : (Auteur) Presented paper is dedicated to problems of deformation of the Earth's crust as a response to the surface loading caused by continental waters. The aim of this study was to specify areas particularly vulnerable to studied deformation and to compare calculated and observed displacements. Information of the continental water volume was taken from the WaterGAP Global Hydrological Model. Calculated values of the deformations were verified with the results obtained with programs SPOTL and grat. Vertical deformations were almost 10 times higher than the deformation in the horizontal plane, for which reason later part of the paper focuses on the former. In order to check agreement of the calculated and observed deformation 23 stations of International GNSS Service (IGS) were selected and divided into three groups (inland, near the shoreline and islands). Before comparison outliers and discontinuities were removed from GNSS observations. Modelled and observed signals were centred. The analysed time series of the vertical displacements showed that only for the inland stations it is possible to effectively remove displacements caused by mass transfer in the hydrosphere. For stations located in the coastal regions or islands, it is necessary to consider additional movement effects resulting from indirect ocean tidal loading or atmosphere loading. Numéro de notice : A2016-651 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/rgg-2016-0020 En ligne : http://dx.doi.org/10.1515/rgg-2016-0020 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81870 [article]

vol 91 n° 2 - 01/07/2011 - Proceedings of the EGU G 6.1 symposium "Geodetic and geodynamic programmes of the central Europe" Vienna, Austria, 3 - 8 April 2011 (Bulletin de Reports on geodesy) / Tomasz Liwosz

Public [n° ou bulletin]  est un bulletin de Reports on geodesy / Instytut geodezji wyzszej i astronomii geodezyjnej (1984 - 2012)   Titre : vol 91 n° 2 - 01/07/2011 - Proceedings of the EGU G 6.1 symposium "Geodetic and geodynamic programmes of the central Europe" Vienna, Austria, 3 - 8 April 2011 Type de document : Périodique Auteurs : Tomasz Liwosz, Éditeur scientifique ; J. Sledzinski, Éditeur scientifique ; Warsaw university of technology, Auteur Année de publication : 2011 Conférence : EGU 2011, G 6.1 symposium Geodetic and geodynamic programmes of the central Europe 03/04/2011 08/04/2011 Vienne Autriche programme Importance : 149 p. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale Numéro de notice : 225-201102 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Numéro de périodique Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=15958 [n° ou bulletin]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
225-2011021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Professor Doctor Habil. Czeslaw Kamela. Warsaw 18 junt 2010 (Bulletin de Reports on geodesy) / Tomasz Liwosz

Public [n° ou bulletin]  est un bulletin de Reports on geodesy / Instytut geodezji wyzszej i astronomii geodezyjnej (1984 - 2012)   Titre : Professor Doctor Habil. Czeslaw Kamela. Warsaw 18 junt 2010 Type de document : Périodique Auteurs : Tomasz Liwosz, Éditeur scientifique ; Warsaw university of technology, Auteur Editeur : Varsovie [Pologne] : Warsaw University of Technology Année de publication : 2010 Importance : 52 p. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] astronomie de position [Termes IGN] gravimètre absolu [Termes IGN] gravimétrie [Termes IGN] Roumanie Numéro de notice : 225-201002 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Numéro de périodique Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=15956 [n° ou bulletin]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
225-2010021	RAB	Revue	Centre de documentation	En réserve L003	Disponible