Matches in SemOpenAlex for { <https://semopenalex.org/work/W3043622875> ?p ?o ?g. }
Showing items 1 to 84 of
84
with 100 items per page.
- W3043622875 abstract "<p>The project OPTIMAP is at the current stage a joint initiative of BGIC, GSSAC and DGFI-TUM. The development of an operational tool for ionospheric mapping and prediction is the main goal of the project.</p><p>The ionosphere is a dispersive medium. Therefore, GNSS signals are refracted while they pass through the ionosphere. The magnitude of the refraction rate depends on the frequencies of the transmitted GNSS signals. The ionospheric disturbance on the GNSS signals paves the way of extracting Vertical Total Electron Content (VTEC) information of the ionosphere.</p><p>In OPTIMAP, the representation of the global and regional VTEC signal is based on localizing B-spline basis functions. For global VTEC modeling, polynomial B-splines are employed to represent the latitudinal variations, whereas trigonometric B-splines are used for the longitudinal variations. The regional modeling in OPTIMAP relies on a polynomial B-spline representation for both latitude and longitude.</p><p>The VTEC modeling in this study relies on both a global and a regional sequential estimator (Kalman filter) running in a parallel mode. The global VTEC estimator produces VTEC maps based on data from GNSS receiver stations which are mainly part of the global real-time IGS network. The global estimator relies on additional VTEC information obtained from a forecast procedure using ultra-rapid VTEC products. The regional estimator makes use of the VTEC product of the real-time global estimator as background information and generates high-resolution VTEC maps using real-time data from the EUREF Permanent GNSS Network. EUREF provides a network of very dense GNSS receivers distributed alongside Europe.</p><p>Carrier phase observations acquired from GPS, GLONASS and GALILEO constellations, which are transmitted in accordance with RTCM standard, are used for real-time regional VTEC modeling. After the acquisition of GNSS data, cycle slips for each satellite-receiver pair are detected, and ionosphere observations are constructed via the linear combination of carrier-phase observations in the data pre-processing step. The unknown B-spline coefficients, as well as the biases for each phase-continuous arc belonging to each receiver-satellite pair, are simultaneously estimated in the Kalman filter.</p><p>Within this study, we compare the performance of regional and global VTEC products generated in real-time using the well-known dSTEC analysis.</p>" @default.
- W3043622875 created "2020-07-23" @default.
- W3043622875 creator A5005863761 @default.
- W3043622875 creator A5009586376 @default.
- W3043622875 creator A5054749693 @default.
- W3043622875 creator A5056302345 @default.
- W3043622875 creator A5062467951 @default.
- W3043622875 creator A5073173295 @default.
- W3043622875 creator A5082074398 @default.
- W3043622875 creator A5083818743 @default.
- W3043622875 date "2020-03-23" @default.
- W3043622875 modified "2023-09-27" @default.
- W3043622875 title "Real-time regional VTEC modeling based on B-splines using real-time GPS, GLONASS and GALILEO observations" @default.
- W3043622875 doi "https://doi.org/10.5194/egusphere-egu2020-15908" @default.
- W3043622875 hasPublicationYear "2020" @default.
- W3043622875 type Work @default.
- W3043622875 sameAs 3043622875 @default.
- W3043622875 citedByCount "0" @default.
- W3043622875 crossrefType "posted-content" @default.
- W3043622875 hasAuthorship W3043622875A5005863761 @default.
- W3043622875 hasAuthorship W3043622875A5009586376 @default.
- W3043622875 hasAuthorship W3043622875A5054749693 @default.
- W3043622875 hasAuthorship W3043622875A5056302345 @default.
- W3043622875 hasAuthorship W3043622875A5062467951 @default.
- W3043622875 hasAuthorship W3043622875A5073173295 @default.
- W3043622875 hasAuthorship W3043622875A5082074398 @default.
- W3043622875 hasAuthorship W3043622875A5083818743 @default.
- W3043622875 hasConcept C102451475 @default.
- W3043622875 hasConcept C104317684 @default.
- W3043622875 hasConcept C105795698 @default.
- W3043622875 hasConcept C116403925 @default.
- W3043622875 hasConcept C121332964 @default.
- W3043622875 hasConcept C13280743 @default.
- W3043622875 hasConcept C14279187 @default.
- W3043622875 hasConcept C165391973 @default.
- W3043622875 hasConcept C176379880 @default.
- W3043622875 hasConcept C185429906 @default.
- W3043622875 hasConcept C185592680 @default.
- W3043622875 hasConcept C205649164 @default.
- W3043622875 hasConcept C33923547 @default.
- W3043622875 hasConcept C41008148 @default.
- W3043622875 hasConcept C547475151 @default.
- W3043622875 hasConcept C55493867 @default.
- W3043622875 hasConcept C56456773 @default.
- W3043622875 hasConcept C60229501 @default.
- W3043622875 hasConcept C76155785 @default.
- W3043622875 hasConcept C8058405 @default.
- W3043622875 hasConceptScore W3043622875C102451475 @default.
- W3043622875 hasConceptScore W3043622875C104317684 @default.
- W3043622875 hasConceptScore W3043622875C105795698 @default.
- W3043622875 hasConceptScore W3043622875C116403925 @default.
- W3043622875 hasConceptScore W3043622875C121332964 @default.
- W3043622875 hasConceptScore W3043622875C13280743 @default.
- W3043622875 hasConceptScore W3043622875C14279187 @default.
- W3043622875 hasConceptScore W3043622875C165391973 @default.
- W3043622875 hasConceptScore W3043622875C176379880 @default.
- W3043622875 hasConceptScore W3043622875C185429906 @default.
- W3043622875 hasConceptScore W3043622875C185592680 @default.
- W3043622875 hasConceptScore W3043622875C205649164 @default.
- W3043622875 hasConceptScore W3043622875C33923547 @default.
- W3043622875 hasConceptScore W3043622875C41008148 @default.
- W3043622875 hasConceptScore W3043622875C547475151 @default.
- W3043622875 hasConceptScore W3043622875C55493867 @default.
- W3043622875 hasConceptScore W3043622875C56456773 @default.
- W3043622875 hasConceptScore W3043622875C60229501 @default.
- W3043622875 hasConceptScore W3043622875C76155785 @default.
- W3043622875 hasConceptScore W3043622875C8058405 @default.
- W3043622875 hasLocation W30436228751 @default.
- W3043622875 hasOpenAccess W3043622875 @default.
- W3043622875 hasPrimaryLocation W30436228751 @default.
- W3043622875 hasRelatedWork W118578 @default.
- W3043622875 hasRelatedWork W183000 @default.
- W3043622875 hasRelatedWork W2113234 @default.
- W3043622875 hasRelatedWork W2243134 @default.
- W3043622875 hasRelatedWork W236396 @default.
- W3043622875 hasRelatedWork W405433 @default.
- W3043622875 hasRelatedWork W4681561 @default.
- W3043622875 hasRelatedWork W9664278 @default.
- W3043622875 hasRelatedWork W9706003 @default.
- W3043622875 hasRelatedWork W991225 @default.
- W3043622875 isParatext "false" @default.
- W3043622875 isRetracted "false" @default.
- W3043622875 magId "3043622875" @default.
- W3043622875 workType "article" @default.