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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Inovace PPK GNSS senzoru Titan v posuzování zemětřesné kinematiky
 Šugar, Danijel ; Ukas, Mladen
Within the sotware package Trimble Business Center ver. 5.90 (May 2023) was released a novel PPK GNSS processor named Titan. It utilizes all available GNSS constellations bringing improvement over the previous processor. CROPOS as the national permanent GNSS network of Croatia was modernized in summer of 2019 and since than it provides observations of all available GNSS constellations, namely, the GPS, GLONASS, Galielo and BeiDou. On March 22nd 2020, the wider area of Zagreb was hit by the M5.4 earthquake. The closest GNSS station to the epicenter (approx. 9 km) was the station ZAGR in Zagreb downtown and as such it was subject to earthquake shaking. Although the kinematic effects of that earthquake have already been assessed and examined, with this approach and novel PPK GNSS processor we are attempting to provide new insights into the earthquake kinematics involving observations from several CROPOS's GNSS stations in wider area around Zagreb.
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Posouzení stability stanic CROPOS po sérii zemětřesení Petrinja 2020–2021
 Šugar, Danijel ; Blagus, Luka ; Bačíć, Željko
The wider area of the town of Petrinja along with the region of Banija in North-Western Croatia was hit by the earthquake series in December 2020. The series started with the M5.2 earthquake on 28 December 2020 and continued the day after with the mainshock being of M6.4 causing 7 human casualties and huge damage to buildings and infrastructure. That earthquake was felt are reported by humans more than 600 km away from the epicenter. CROPOS as a permanent GNSS network at the time of the earthquake series consisted of 33 stations installed on the Croatian territory among which the SISA station was the closest one to the epicentral area. Static daily observation files from the SISA station along with data from its 6 surrounding stations were processed and results were analyzed to assess their stability and possible permanent displacement. The dataset timeframe consisted of five days before the earthquake series and five days after the mainshock. In that time window (12 days) occurred numerous quakes, 5 of them having M ≥ 4.5. Observation data were processed by static PPP method using two different web services, namely Trimble RTX and CSRS-PPP. The results have shown a maximum permanent displacement of the SISA station: 5.3 cm horizontally, and -2.5 cm vertically
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