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Start Over Rights http://creativecommons.org/publicdomain/mark/1.0/ Subject geologie

12. Estimates of seasonal signals in GNSS time series and environmental loading models with iterative least-squares estimation (ILSE) approach

Creator:
Kaczmarek, Adrian and Kontny, Bernard
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
geodynamika, geomechanika, geofyzika, geologie, geodynamics, geomechanics, geophysics, geology, wavelet analysis, seasonal signal, coordinates time series, loading models, phase shift, cross-correlation, correlation coefficient, 7, and 551
Language:
English
Description:
The GNSS (Global Navigation Satellite System) coordinates time series are still used as a source for determining the velocities of GNSS permanent stations. These coordinates, apart from the geodynamical signals, also contain an interference signal. This paper shows the results of the comparative analysis of the GNSS coordinates time series with a deformation of the Earth's crust obtained from loading models. In the analysis, coordinates time series are used (CODE Repro2013) without loading models (Atmospheric Pressure Loading, Hydrology, Non-Tidal Ocean Loading) at the stage of the reprocessing of GNSS archival data. The analyses showed that in the case of the Up component there is a high correlation between the GNSS coordinates changes and deformations of the Earth's crust from the loading models (coefficient 0.5-0.8). Additionally, we noticed that for horizontal components (North, East) changes occur in the phase shift between coordinates, and the Earth’s crust deformations signals are accelerated or delayed each other (-150 to 200 days). This article shows new methods of iLSE (iteration Least Square Estimation) to determine periodic signals in the time series. Additionally, we compared the values of estimated amplitudes for GNSS and deformation time series. and Kaczmarek Adrian, Kontny Bernard.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

13. Evaluation of long-term BeiDou/GPS observation quality based on G-Nut/Anubis and initial results

Creator:
Zhao, Lewen, Jan Douša, Václavovič, Pavel, Ye, Shirong, and Xia, Fengyu
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
geodynamika, geomechanika, geofyzika, geologie, otevřený software, jakost, geodynamics, geomechanics, geophysics, geology, open source software, pozorování, G-Nut/Anubis, pre-processing, BeiDou, observation quality, open source, 7, and 551
Language:
English
Description:
Reliable observations are the prerequisite for high-precision GNSS data processing. Data quality evaluation at the pre-processing procedure can help the user to identify the weakness of the observations. The open source software package G-Nut/Anubis developed at Geodetic Observatory Pecny (GOP) is introduced and used for the evaluation of long-term BeiDou/GPS signal. Several key indicators are selected to evaluate the BeiDou/GPS observations. Quantitative analysis shows that more than 100 stations can achieve 6-hour standalone BeiDou positioning at least. The completeness of the BeiDou phase and code observations at three frequencies is higher than that of the GPS observations in the selected station which is mainly attributed to the high elevation observations from GEO and IGSO satellites. Qualitative analysis shows that the multipath effects for pseudorange observations are correlated with signal, receiver types and firmware versions besides the station environment. Users attempting to improve the pseudorange observations by multipath filter should pay attention also to the receiver-specific settings. Cycle slip counts are used to indicate the quality of carrier-phase observations. Results show that BeiDou C05 satellite is more affected by the cycle slips, in particular the third frequency observables. For GPS, the third frequency is more robust compared to the legacy frequencies. Comprehensive single point positioning results show that positioning accuracy for BeiDou is worse than that of GPS, which is mainly caused by less active satellites, worse geometry and the larger errors in the broadcast ephemeris. The BeiDou positioning accuracy was further degraded by the C13/C15 satellite and dominated by large clock errors. Broadcast evaluation shows that the BeiDou orbit errors are related to the constellations. Overall, the orbit precision for both GPS and BeiDou has been gradually improved. Outliers were observed for navigation records assigned with the healthy status, especially for BeiDou broadcast orbits. and Zhao Lewen, Dousa Jan, Vaclavovic Pavel, Ye Shirong, Xia Fengyu.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

15. Geologické poměry okolí Komárova

Creator:
Hynie, Ota
Publisher:
[nákl.vl.]
Format:
print, text, regular print, and S. 300-323 ; 8°
Type:
model:monograph and TEXT
Subject:
Vědy o Zemi. Geologické vědy, geologie, horniny, Komárov (Beroun, Česko : oblast), 55, 7, and UB02
Language:
Czech
Description:
Podává Ota Hynie, Tb. příl., Zvl. ot. ze Sborníku St. geolog. ústavu čs. republ. Roč. 1923. Sv. 2., díl 2, and Franc. souhrn
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

16. Geologické profily Barrandienem

Creator:
Radim Kettner and Odolen Kodym
Publisher:
Státní geolog. ústav Čsl. rep.
Format:
print, text, regular print, and 34 s. : 2 mapy, 2 tab. příl.
Type:
model:monograph and TEXT
Subject:
Vědy o Zemi. Geologické vědy, geologie, Brdy (Česko : pohoří : oblast), 7, 55, and UB03
Language:
Czech
Description:
1. část, Brdské hřebeny, Radim Kettner a Odolen Kodym, and Franc. souhrn
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

17. Geologische Skizzen aus der Umgebung Aussigs: eine Anleitung zur selbständigen Naturbeobachtung

Creator:
Bruder, Georg
Publisher:
Ad. Becker's Buchhandlung and Rudolf Becker)
Format:
print and 65 s., [14] l. obr. příl. : il. ; 24 cm
Type:
Text, monografie, studie, volume, model:monograph, and TEXT
Subject:
geologie, geologie--Česko, regionální geologie, regionální geologie--Česko, geomorfologie, geomorfologie--Česko, geologické poměry, geologické poměry--Ústí nad Labem (Česko : oblast), 55, 551.1/.4, and 551.4
Language:
German
Description:
von Georg Bruder and Obsahuje bibliografii a bibliografické odkazy
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

18. Geomechanical modeling of subsidence related strains causing earth fissures

Creator:
Malinowska, Agnieszka A, Misa, Rafał, and Tajduś, Krzysztof
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
geodynamika, geomechanika, geofyzika, geologie, těžba uhlí, geodynamics, coal mining, geophysics, geology, geomechanics, geomechanical modelling, horizontal stress, subsidence, earth fissures, 7, and 551
Language:
English
Description:
The research is focused on the feasibility analysis of a numerical model describing the field of strains generated by mining-induced subsidence caused by a deep underground coal extraction, which may contribute to the formation of Earth fissures. The finite elements method and Knothe’s theory were used in the research. The geomechanical modeling was applied for defining zones of strains and maximum horizontal deformations of the terrain. Knothe’s theory was employed for defining boundary conditions of the geomechanical model. The parameters of the empirical and geomechanical models were scaled out on the basis of geodetic surveys in the mining area. The results of geomechanical modeling were compared with the geodetic surveys to select the best model. The presented research confirmed high congruence between the results of modeling with the finite elements method and observations of vertical movements on the surface. The results of modeling also confirmed the assumed highest stress in areas where earth fissures were observed. The proposed solution may be a new research tool applicable to areas where earth fissures potentially occur. and Malinowska Agnieszka A., Misa Rafał, Tajduś Krzysztof.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

19. Granity A-typu v Krušných horách

Creator:
Karel Breiter
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, žuly, ložiska nerostných surovin, geologie, disertace, vysokoškolské kvalifikační práce, granites, deposits of raw materials, geology, dissertations, academic theses, Krušné hory (Česko a Německo), Krušné hory Mountains (Czechia and Germany), 12, and 00
Language:
Czech
Description:
Karel Breiter.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

20. Identification of pseudo-nodal points on the basis precise leveling campaigns data and GNSS

Creator:
Bednarczyk, Michal, Kowalczyk, Kamil, and Kowalczyk, Anna
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
geodynamika, geomechanika, geofyzika, geologie, satelitní navigační systémy, geodynamics, geomechanics, geophysics, geology, satellite navigation systems, hybrid models, scale free network, pseudo nodal points, 7, and 551
Language:
English
Description:
Four precise leveling campaigns has been carried out in Poland, and for several years there is a functioning system of permanent GNSS stations determining the height of network points. On the basis of these data, several variants of vertical crustal movements models have been developed (Wyrzykowski, 1987; Kowalczyk, 2005; Kontny and Bogusz, 2012). In order to develop a kinematic model of vertical crustal movements, one of the possibilities is an adjustment of the network formed simultaneously with the leveling data and GNSS stations data. The main problem is a need to identify fiducial points between the datasets. This problem can be solved by creation of coherent database containing attributes of both types of data and automatization of the joint point identification process. The article shows the results of such identification process, depending on the amount of data, on the example of the area of Poland. and Bednarczyk Michal, Kowalczyk Kamil, Kowalczyk Anna.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

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