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| Description
| - Radar interferometry (InSAR) is a method used for deformation mapping within large areas, using radar images acquired by satellite instruments. We use four ENVISAT stacks of SAR images acquired from 2003 to 2009 in our project - track 43 (12 scenes acquired; ascending pass), track 122 (10 scenes acquired; descending pass), track 272 (13 scenes acquired; ascending pass) and track 351 (11 scenes acquired; descending pass). Unfortunately, no more scenes are available for the area due to conflicts with other projects. Processing of the whole scene would be too time- and memory- consuming, and that's why only the area of interest was cut from every scene and the process continued with these cuts. Several tunnels were finished after 2000 in Prague and some are still under construction. We are trying to find out whether there are subsidences within these areas. The permanent scatterers (PS) method is used for deformation detection. The processing is performed by IPTA (Interferometric Point Target Analysis) package, which is a part of the GAMMA software. Only appropriate point targets are used for further processing, while the rest of points are omitted. In conventional InSAR processing, many interferograms were obtained from all possible pairs of scenes. Unfortunately, interferograms with the perpendicular baseline longer than 300m were to- tally incoherent, so they were excluded from further processing. The IPTA method is iterative, so it is possible to add also the pairs with longer baselines in further steps. The topography is subtracted from the interferogram by using digital elevation model (DEM). The resulted deformation map can be influenced by the atmospheric delay variation or by inaccurate DEM so we must examine the results and eliminate these kinds of artefacts to get the subsidences. Additionally, it is possible to compare the final deformation maps from various track for better re- sults interpretation.
- Radar interferometry (InSAR) is a method used for deformation mapping within large areas, using radar images acquired by satellite instruments. We use four ENVISAT stacks of SAR images acquired from 2003 to 2009 in our project - track 43 (12 scenes acquired; ascending pass), track 122 (10 scenes acquired; descending pass), track 272 (13 scenes acquired; ascending pass) and track 351 (11 scenes acquired; descending pass). Unfortunately, no more scenes are available for the area due to conflicts with other projects. Processing of the whole scene would be too time- and memory- consuming, and that's why only the area of interest was cut from every scene and the process continued with these cuts. Several tunnels were finished after 2000 in Prague and some are still under construction. We are trying to find out whether there are subsidences within these areas. The permanent scatterers (PS) method is used for deformation detection. The processing is performed by IPTA (Interferometric Point Target Analysis) package, which is a part of the GAMMA software. Only appropriate point targets are used for further processing, while the rest of points are omitted. In conventional InSAR processing, many interferograms were obtained from all possible pairs of scenes. Unfortunately, interferograms with the perpendicular baseline longer than 300m were to- tally incoherent, so they were excluded from further processing. The IPTA method is iterative, so it is possible to add also the pairs with longer baselines in further steps. The topography is subtracted from the interferogram by using digital elevation model (DEM). The resulted deformation map can be influenced by the atmospheric delay variation or by inaccurate DEM so we must examine the results and eliminate these kinds of artefacts to get the subsidences. Additionally, it is possible to compare the final deformation maps from various track for better re- sults interpretation. (en)
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| Title
| - Interferometric determination of subsidences in Prague city (preliminary results)
- Interferometric determination of subsidences in Prague city (preliminary results) (en)
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| skos:prefLabel
| - Interferometric determination of subsidences in Prague city (preliminary results)
- Interferometric determination of subsidences in Prague city (preliminary results) (en)
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| skos:notation
| - RIV/68407700:21110/12:00204098!RIV13-MSM-21110___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21110/12:00204098
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - radar interferometry (InSAR); subsidence; permanent scatterers (PS) (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - 32nd EARSeL Symposium Proceedings Advances in Geosciences
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Halounová, Lena
- Hlaváčová, Ivana
- Svobodová, Květoslava
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| number of pages
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| http://purl.org/ne...btex#hasPublisher
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
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