000193067 001__ 193067
000193067 003__ CZ-ZdVUG
000193067 005__ 20190211101356.0
000193067 044__ $$agw
000193067 041__ $$aeng
000193067 040__ $$aABC039$$bcze
000193067 1001_ $$aDouša, Jan
000193067 24510 $$aBenchmark campaign and case study episode in central Europe fordevelopment and assessment of advanced GNSS troposphericmodels and products
000193067 300__ $$a20 stran
000193067 5203_ $$9eng$$aInitial  objectives  and  design  of  the  Benchmark campaign  organized  within  the  European  COST  Action ES1206 (2013–2017) are described in the paper. This campaign has aimed to support the development and validationof advanced Global Navigation Satellite System (GNSS) tropospheric  products,  in  particular  high-resolution  and  ultra-fast  zenith  total  delays  (ZTDs)  and  tropospheric  gradientsderived  from  a  dense  permanent  network.  A  complex  dataset  was  collected  for  the  8-week  period  when  several  extreme heavy precipitation episodes occurred in central Europe which caused severe river floods in this area. An initial processing of data sets from GNSS products and numerical weather models (NWMs) provided independently esti-mated reference parameters – zenith tropospheric delays and tropospheric  horizontal  gradients.  Their  provision  gave  an overview about the product similarities and complementarities, and thus a potential for improvements of a synergy in their  optimal  exploitations  in  future.  Reference  GNSS  and NWM results were intercompared and visually analysed using animated maps. ZTDs from two reference GNSS solutions  compared  to  global  ERA-Interim  reanalysis  resulted in  accuracy  at  the  10 mm  level  in  terms  of  the  root  meansquare (rms) with a negligible overall bias, comparisons to Global Forecast System (GFS) forecasts showed accuracy atthe 12 mm level with the overall bias of5 mm and, finally, comparisons to mesoscale ALADIN-CZ forecast resulted inaccuracy at the 8 mm level with a negligible total bias. The comparison of horizontal tropospheric gradients from GNSS and NWM data demonstrated a very good agreement among independent solutions with negligible biases and an accuracyof about 0.5 mm. Visual comparisons of maps of zenith wet delays  and  tropospheric  horizontal  gradients  showed  very promising results for future exploitations of advanced GNSS tropospheric  products  in  meteorological  applications,  suchas  severe  weather  event  monitoring  and  weather  now casting. The GNSS products revealed a capability of providingmore detailed structures in atmosphere than the state-of-the-art numerical weather models are able to capture. In an initial study on the contribution of hydrometeors (e.g. cloud water, ice or snow) to GNSS signal delays during severe weather, the effect reached up to 17 mm, and it was suggested that hydrometeors should be carefully accounted for within the functional model. The reference products will be further exploited in various specific studies using the Benchmark data set. It is thus going to play a key role in these highly interdisciplinary developments towards better mutual benefits from advanced GNSS and meteorological products.
000193067 655_4 $$ačlánek
000193067 653_0 $$agps meteorology$$anumerical weather prediction
000193067 7001_ $$aDick, Galina
000193067 7001_ $$aKačmařík, Michal
000193067 7001_ $$aBrožková, Radmila
000193067 7001_ $$aZus, Florian
000193067 7001_ $$aBrenot, Hugues
000193067 7001_ $$aStoycheva, Anastasia
000193067 7001_ $$aMöller, Gregor
000193067 7001_ $$aKaplon, Jan
000193067 7730_ $$92016$$dSpolková republika Německo$$gSv. 9 (2016), č. 7, str. 2989–3008$$tAtmospheric Measurement Techniques$$x1867-8548
000193067 856__ $$uurn:doi:10.5194/amt-9-2989-2016
000193067 8564_ $$ahttp://www.atmos-meas-tech.net/9/2989/2016/
000193067 85640 $$uhttps://www.researchgate.net/publication/305331964_Benchmark_campaign_and_case_study_episode_in_central_Europe_for_development_and_assessment_of_advanced_GNSS_tropospheric_models_and_products
000193067 8564_ $$uhttp://knihovna.vugtk.cz/record/193067/files/i2016-dousa-benchmark--amt-9-2989-2016.pdf
000193067 85642 $$uhttps://www.rvvi.cz/riv?s=jednoduche-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F16%3AN0000056%21RIV17-MSM-00025615
000193067 980__ $$aclanky_vugtk
000193067 985__ $$adousa
000193067 985__ $$aanotace
000193067 985__ $$autvar24
000193067 985__ $$aonline
000193067 985__ $$ariv
000193067 999C1 $$9CURATOR$$aED1.1.00/02.0090 NTIS$$bMŠMT ED
000193067 999C1 $$9CURATOR$$aLD14102 - Rozvoj pokročilých metod zpracování GNSS observací v synergii s meteorologickými a klimatickými daty (2014 - 2017)$$bMŠMT LD
000193067 999C1 $$9CURATOR$$aLM2015079 - Distribuovaný systém observatorních a terénních měření geofyzikálních polí (2016 - 2017)$$bMŠMT LM