Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Monitoring of atmospheric water vapor by the analiysis of GNSS observations |
Sekundarni povzetek: |
The graduation thesis analyses the possibilities of usage of GNSS technology for observing the presence of water vapor in the air. Water vapor causes the delay of signals propagating from GNSS sattelites to ground-based GNSS receivers. We call that tropospheric refraction. We can estimate this delay pretty well and connect it with the height of the water column. Researches showed, that that way we can produce data, that are used by meteorologists for weather observation and weather forecasts. With the experiment, we checked, whether there is a connection/correlation between zenith wet delay, estimated with GNSS gathered data and meteorological data of presence of water vapor. The distribution of water vapor is closely connected to the distribution of clouds and rainfall.
First, we compared graphical presentation of data on distribution of water vapor, collected with GNSS on the area of Slovenia, with the rainfall radar picture. It proved that we can't compare those data and that the connection between water vapor and rainfalls is not that simple. Then we also compared GNSS observation of water vapor with meteorological calculation of water vapor density. Results of statistical analysis showed, that there is a middle to strong connection between both types of data.
Results of the researches and analysis that were done abroad show, that GNSS analysis of presence of water vapor, along with cooperation of experts from both, geodesy and meteorology, could maybe become useful as a replacement tool for meteorological observations, or at least an improvement or completion of them. |
Sekundarne ključne besede: |
graduation thesis;geodesy;TUN;GNSS meteorology;tropospheric refraction;water vapor;observing presence of water vaporin the air; |
Vrsta datoteke: |
application/pdf |
Vrsta dela (COBISS): |
Diplomsko delo/naloga |
Komentar na gradivo: |
Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo |
Strani: |
XII, 46 str., 2 pril. |
Vrsta dela (ePrints): |
thesis |
Naslov (ePrints): |
Monitoring of atmospheric water vapor by the analysis of GNSS observations |
Ključne besede (ePrints): |
GNSS meteorologija;troposferska refrakcija;vodna para;opazovanje prisotnosti vodne pare v zraku |
Ključne besede (ePrints, sekundarni jezik): |
GNSS meteorology;tropospheric refraction;water vapor;observing presence of water vapor in the air |
Povzetek (ePrints): |
Diplomska naloga preučuje možnosti uporabe tehnologije GNSS za ugotavljanje prisotnosti vodne pare v zraku. Zaradi vodne pare v ozračju pride do zakasnitve signala na poti od oddajnika do sprejemnika, kar imenujemo troposferska refrakcija. To zakasnitev lahko zelo dobro ocenimo in jo povežemo z vsebnostjo vodne pare v stolpcu zraka. Študije kažejo, da lahko na ta način in s primerno obdelavo podatkov zagotavljamo podatke, ki jih uporabljajo meteorologi za opazovanje vremena in vremenske napovedi. Na konkretnem primeru smo preverili, ali obstaja povezava med vrednostmi mokre komponente troposferske refrakcije, zaznanimi z metodo GNSS, in meteorološkimi opazovanji prisotnosti vodne pare.
Razporeditev vodne pare vpliva na razporeditev oblakov in padavin. Najprej smo podatke GNSS- opazovanj o količini vodne pare, zbranih na območju celotne Slovenije, interpolirali in izrisali ter izris primerjali z radarsko sliko padavin. Izkazalo se je, da teh rezultatov ne moremo primerjati in da podatka o količini vodne pare ne moremo tako enostavno povezati s podatki o padavinah.
Primerjali smo tudi GNSS-opazovanja prisotnosti vodne pare z meteorološkim izračunom gostote vodne pare na eni točki. Rezultati statistične obdelave so pokazali, da med podatki obstaja srednja do močna povezanost.
Rezultati lastne analize in podatki študij v tujini kažejo, da bi lahko tak način analize prisotnosti vodne pare ob sodelovanju strokovnjakov s področja geodezije in meteorologije prišel v uporabo namesto meteoroloških opazovanj, zagotovo pa bi jih lahko vsaj izboljšal ali dopolnil. |
Povzetek (ePrints, sekundarni jezik): |
The graduation thesis analyses the possibilities of usage of GNSS technology for observing the presence of water vapor in the air. Water vapor causes the delay of signals propagating from GNSS sattelites to ground-based GNSS receivers. We call that tropospheric refraction. We can estimate this delay pretty well and connect it with the height of the water column. Researches showed, that that way we can produce data, that are used by meteorologists for weather observation and weather forecasts. With the experiment, we checked, whether there is a connection/correlation between zenith wet delay, estimated with GNSS gathered data and meteorological data of presence of water vapor. The distribution of water vapor is closely connected to the distribution of clouds and rainfall.
First, we compared graphical presentation of data on distribution of water vapor, collected with GNSS on the area of Slovenia, with the rainfall radar picture. It proved that we can't compare those data and that the connection between water vapor and rainfalls is not that simple. Then we also compared GNSS observation of water vapor with meteorological calculation of water vapor density. Results of statistical analysis showed, that there is a middle to strong connection between both types of data.
Results of the researches and analysis that were done abroad show, that GNSS analysis of presence of water vapor, along with cooperation of experts from both, geodesy and meteorology, could maybe become useful as a replacement tool for meteorological observations, or at least an improvement or completion of them. |
Ključne besede (ePrints, sekundarni jezik): |
GNSS meteorology;tropospheric refraction;water vapor;observing presence of water vapor in the air |
ID: |
8312971 |