elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Status of GNSS reflectometry related receiver developments and feasibility studies in the frame of the German Indonesian Tsunami Early Warning System

Helm, Achim und Stosius, Ralf und Beyerle, Georg und Montenbruck, Oliver und Rothacher, Markus (2007) Status of GNSS reflectometry related receiver developments and feasibility studies in the frame of the German Indonesian Tsunami Early Warning System. IEEE. IGARSS-07, International Geoscience and Remote Sensing Symposium 2007, 2007-07-23 - 2007-07-27, Barcelona. ISBN 978-1-4244-1212-9.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

In the frame of the German Indonesian Tsunami Early Warning System (GITEWS) project a multi-frequency Global Navigation Satellite System (GNSS) Occultation, Reflectometry and Scatterometry (GORS) space receiver is developed. It is based on commercial off-the-shelf (COTS) GNSS receiver technology, as the core instrument for a future tsunami detection constellation of small Low Earth Orbit (LEO) satellites. For use in reflectometry, scatterometry and radio-occultation measurements as well as high-precision navigation applications, specific adaptations of the GNSS receiver firmware are desirable, which require a close interaction between scientists and the receiver manufacturer. Within the GITEWS project GFZ has set up a team consisting of GFZ, DLR and JAVAD GNSS (JAVAD) to adapt and extend their new generation GNSS receivers for advanced scientific space applications. Specific adaptations address the improvement of the cold start time-to-first-fix, the selection of optimal tracking loop parameters and channel slaving for monitoring of reflected signals. Besides pseudorange, phase and signal-to-noise measurements, the modified receiver allows output of In-Phase (I) and Quadrature-Phase (Q) accumulations at 5msec intervals (200Hz). As a major step forward compared to current space receivers, the new receiver supports tracking of the civil L2C signal of the GPS constellation. An overview of the current status is given and first results are discussed. Within GITEWS the feasibility of a tsunami detection mission is studied, including the constellation mission design, the options for operating the system and the ways to develop an end-toend system for the quick response to tsunami events. In parallel simulation studies of the GNSS signals reflected to a LEO satellite are carried out. This will be realised by a Zavorotny and Voronovich scattering model with a two-scale model approach using an Elfouhaily sea wave spectrum. An overview of the current activities is given and first results are discussed.

Dokumentart:Konferenzbeitrag (Paper)
Zusätzliche Informationen:DOI 10.1109/IGARSS.2007.4424005
Titel:Status of GNSS reflectometry related receiver developments and feasibility studies in the frame of the German Indonesian Tsunami Early Warning System
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Helm, AchimGFZ
Stosius, RalfGFZ
Beyerle, GeorgGFZ
Montenbruck, OliverNICHT SPEZIFIZIERT
Rothacher, MarkusGFZ
Datum:Juli 2007
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 5084-5087
Verlag:IEEE
ISBN:978-1-4244-1212-9
Status:veröffentlicht
Stichwörter:GNSS reflectometry, Tsunami, GPS
Veranstaltungstitel:IGARSS-07, International Geoscience and Remote Sensing Symposium 2007
Veranstaltungsort:Barcelona
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2007-07-23 - 2007-07-27
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W SY - Technik für Raumfahrtsysteme
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W SY - Technik für Raumfahrtsysteme
DLR - Teilgebiet (Projekt, Vorhaben):W -- keine Zuordnung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Raumflugbetrieb und Astronautentraining
Hinterlegt von: Dr.rer.nat.hab. Oliver Montenbruck
Hinterlegt am:03 Mär 2008
Letzte Änderung:27 Apr 2009 14:23

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.