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A new approach for ionospheric TEC prediction at a GPS station

Hoque, Mohammed Mainul und Jakowski, Norbert und Berdermann, Jens (2016) A new approach for ionospheric TEC prediction at a GPS station. In: 29th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2016. ION GNSS+ 2016, 2016-09-12 - 2016-09-16, Portland, Oregon. doi: 10.33012/2016.14763.

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Offizielle URL: https://www.ion.org/gnss/

Kurzfassung

Ionosphere can adversely affect radio signals that propagate through the ionosphere. Due to this, ionosphere is considered as a major error source for space-based radio systems such as Global Navigation Satellite Systems (GNSS) and remote sensing radars. To aid single frequency operations the Global Positioning System (GPS) and global navigation satellite system Galileo broadcast ionospheric correction coefficients in the navigation message. The GPS/Galileo updates ionospheric coefficients every 24 hours that means the given corrections are predictions 24 hours ahead [Hoque et al. 2015]. Ionosphere induces propagation delay on signal which is directly proportional to the ionospheric total electron content called TEC. Therefore, the knowledge of the TEC and its prediction is of great importance for any radio systems that deals with trans-ionospheric signals. The GNSS signals propagate through the ionosphere on their way to receivers on the Earth’s surface. On one hand GNSS signals are affected by the ionosphere and on other hand when signals are transmitted in two or more frequencies they can effectively be used to estimate the ionospheric TEC utilizing the dispersive property of the ionosphere. An important characteristic of the GPS constellation is that the same satellite appears in the same part of the sky with a period of approximately 4 minutes less than one day. During this period a GPS satellite completes exactly two orbits in inertial space whereas the Earth completes one revolution. This brings the same ray path geometry when looking to the same satellite from a location on Earth. This repetition is known to be used in mitigating local multipath noises in the received signals. In the present study we found that this repetition can be successfully used for predicting TEC along a receiver-satellite link. The main source of ionospheric ionization is the solar extreme ultra violet (EUV) radiation at wave lengths < 130 nm. In addition to the photoionization by EUV radiation, energetic particles from the solar wind and cosmic rays contribute to the total ionization but to a much lesser extent. Thus, the TEC which is an integral measure of the electron density depends on local time, geographic / geomagnetic location, geomagnetic conditions, season and solar activity level. The daytime TEC values frequently exceed the nighttime values by one order of magnitude.

elib-URL des Eintrags:https://elib.dlr.de/104137/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:A new approach for ionospheric TEC prediction at a GPS station
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Hoque, Mohammed MainulMainul.Hoque (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Jakowski, Norbertnorbert.jakowski (at) dlr.dehttps://orcid.org/0000-0003-3174-2624NICHT SPEZIFIZIERT
Berdermann, Jensjens.berdermann (at) dlr.dehttps://orcid.org/0000-0002-3308-4584NICHT SPEZIFIZIERT
Datum:2016
Erschienen in:29th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2016
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.33012/2016.14763
Status:veröffentlicht
Stichwörter:GNSS, ionosphere, TEC prediction, model
Veranstaltungstitel:ION GNSS+ 2016
Veranstaltungsort:Portland, Oregon
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:12 September 2016
Veranstaltungsende:16 September 2016
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Kommunikation und Navigation
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R KN - Kommunikation und Navigation
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Ionosphäre (alt)
Standort: Neustrelitz
Institute & Einrichtungen:Institut für Kommunikation und Navigation > Navigation
Hinterlegt von: Hoque, Mohammed Mainul
Hinterlegt am:26 Jan 2017 13:40
Letzte Änderung:24 Apr 2024 20:09

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