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412. O předpovídání povětrnosti
- Creator:
- Studnička, František Josef
- Publisher:
- Nákladem vlastním
- Format:
- print, text, regular print, and 27 s.
- Type:
- model:monograph and TEXT
- Subject:
- 551.51, 551.5, 551, 7, klima, počasí, meteorologie, and Geologie. Meteorologie. Klimatologie
- Language:
- Czech
- Description:
- přednášel dne 20. listopadu 1889 F.J. Studnička, Separát z: Hospodář českoslovanský. Roč. XX., and Converted from MODS 3.5 to DC version 1.8 (EE patch 2015/06/25)
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
413. Observatoř Milešovka /
- Creator:
- Zacharov, Petr,
- Type:
- text and publikace informační
- Subject:
- Geologie. Meteorologie. Klimatologie, meteorologie, vlastivěda, hory, observatoře meteorologické, Československo 1918-1992, and vědy o neživé přírodě, přírodní prostředí, astronomie
- Language:
- Czech
- Rights:
- unknown
414. Ochozská jeskyně, historická ohlédnutí /
- Creator:
- Slezák, Ladislav
- Type:
- text and studie
- Subject:
- Geologie. Meteorologie. Klimatologie, jeskyně, speleologie, české země 1792-1847, and vědy o neživé přírodě, přírodní prostředí, astronomie
- Language:
- Czech
- Rights:
- unknown
415. Odešel Vilém Gross /
- Creator:
- Kruťa, Tomáš,
- Type:
- text and nekrology
- Subject:
- Geologie. Meteorologie. Klimatologie, Gross, Vilém,, pracovníci vlastivědní, geologové, dějiny regionální a vlastivědné práce, jednotlivci, Československo 1918-1992, and vědy o neživé přírodě, přírodní prostředí, astronomie
- Language:
- Czech
- Rights:
- unknown
416. Odolen Kodym :
- Creator:
- Chodějovský, Jan
- Type:
- text and medailony
- Subject:
- Geologie. Meteorologie. Klimatologie, Kodym, Odolen,, geologové, mineralogové, vědci, Československo 1918-1992, and vědy o neživé přírodě, přírodní prostředí, astronomie
- Language:
- Czech
- Rights:
- unknown
417. Odvození základních hydrologických údajů za referenční období 1981-2010 :
- Creator:
- Budík, Ladislav
- Type:
- text and sborníky
- Subject:
- Geologie. Meteorologie. Klimatologie, meteorologie, Československo 1945-1992, české země od r. 1993 do současnosti, and vědy o neživé přírodě, přírodní prostředí, astronomie
- Language:
- Czech
- Description:
- 150 výtisků
- Rights:
- unknown
418. On GPS heighting in local networks
- Creator:
- Otakar Švábenský, Josef Weigel, and Radovan Machotka
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, geodynamika, GPS (navigační systém), geodynamics, GPS (navigation system), height measurements, geoid modelling, 7, and 551
- Language:
- English
- Description:
- Determination of heights with help of GPS in local geodetic networks is still more actual respecting the fact that the GPS technology becames more and more effective with hardware progress, with improvements in measuring and evaluating procedures, and with better modelling of the disturbing influences. In comparison with GPS the employment of classical terrestrial measuring technologies is often more difficult namely in broken mountain environment. In period 1998-2005 authors carried out repeated measurements of GPS baselines of various length and various height differences in local geodynamical network Sněžník and in other experimental areas. On ground of analyses of large GPS data sets the modified procedure for GPS observation was designed. The procedure is based on repetition of shorter static sessions separated by time intervals of optimal length. This technology represents an alternative to the ususal long static sessions, and is offering better effectivity of vertical GPS measurements with minimal loss of accuracy. The paper presents detailed description of the modified procedure together with some statistical analyses of results. The possibilities of elimination or mitigation of some disturbing influences are discussed. Two testing vertical profiles were marked in Sněžník network- longitudinal profile in N-S direction, and transversal profile in E-W direction - which were measured in course of several years by classical method of very precise levelling, and also by modified GPS heighting procedure in repeated sessions. Results obtained contributed to the local quasigeoid model creation., Otakar Švábenský, Josef Weigel and Radovan Machotka., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
419. On the state of the TM 71 extensometer monitoring in Slovenia: seven years of micro-tectonic displacement measurements
- Creator:
- Gosar, Andrej, Šebela, Stanka, Blahoslav Košťák, and Stemberk, Josef
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, geodynamika, geodynamics, Slovinsko, Slovenia, TM 71 extensometer, micro-tectonic displacements, active faulting, 7, and 551
- Language:
- English
- Description:
- At the end of 2010 seven TM 71 extensometers, installed at or near the active faults in Slovenia, were in operation. Three of them are on the surface and four inside karst caves. The highest rates with stable sense of movements were observed on the Idrija fault. Average horizontal displacement rate was 0.24 mm/year. Short term rates were even greater and reached 0.54 mm/year. The Raša fault first experienced an uplift of the SW block of 0.16 mm/year, which was followed by a short-term down-slip of the same block at the rate of 0.37 mm/year. Later the sense of movement returned to uplift with a rate of 0.05 mm/year. The average horizontal displacement was 0.07 mm/year. The Kneža fault experienced very small average displacements (y=0.035 mm/year, z=0.03 mm/year and x=0.02 mm/year). Similar rates were observed in nearby Polog cave (y=0.015 mm/year, z=0.027 mm/year and x=0.016 mm/year), which is located close to the seismically active Ravne fault. For Kostanjevica cave, located near the Brežice fault, small average rates are characteristic (y=0.006 mm/year, z=0.017 mm/year and x=0.012 mm/year). In Postojna cave, located close to the Predjama fault, two monitoring sites are very stable with small tectonic movements, including general dextral horizontal movement of 0.05 mm from 2004 to 2010 (Postojna 1) and two significant short-term peaks of 0.08 mm (Postojna 1-y and Postojna 2-z)., Andrej Gosar, Stanka Šebela, Blahoslav Košťák and Josef Stemberk., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
420. Optimal data processing strategy in precise GPS leveling networks
- Creator:
- Stepniak, Katarzyna, Baryła, Radosław, Wielgosz, Paweł, and Kurpinski, Grzegorz
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, GPS (navigační systém), GPS (navigation system), precise GPS leveling, post-processing, 7, and 551
- Language:
- English
- Description:
- GPS (Global Positioning System) technique has become a major tool in contemporary surveying and geodesy. This concerns mostly measurements of horizontal point coordinates, where centimeter-level accuracies are usually required and easily achievable. For the height component, however, these requirements are higher and millimeter-level accuracy is necessary. On the other hand, the intrinsic precision of GPS-derived heights is clearly lower comparing to the horizontal components. This is due to unfavorable satellite geometry, adverse effects of the troposphere or GPS antenna phase center offset and variations. In order to overcome these effects one has to carefully model all the error sources and rigorously process the GPS data. This paper presents studies on the optimal GPS data processing strategy suitable for precise leveling. This was done through the extensive testing and selection of the most appropriate observational session duration, ambiguity resolution strategy, network geometry, troposphere and ionospheric delay reduction methods, signal linear co mbination, elevation angle cut-off, etc. The analyzed processing strategies were evaluated through the processing of a test network. The test network consisted of 19 monitored points and 5 control points, and covered the area of 20 km x 60 km. The obtained results show that the precise GPS leveling with the selected optimal processing strategy allows for about 3 mm repeatability of height measurements when processing 4-hour long sessions. In our opinion GPS leveling may serve as fast and cost-effective replacement of classic geometric leveling, especially in applications where the hei ghts in orthometric or normal height systems are not necessary. This is the case in, e.g., ground deformation studies., Katarzyna Stepniak, Radosław Baryła, Paweł Wielgosz and Grzegorz Kurpinski., and Obsahuje bibliografické odkazy
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public