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Latest GNSS Signal in Space Developments GPS, QZSS and the new Beidou 3 under examination

Thoelert, Steffen (2018) Latest GNSS Signal in Space Developments GPS, QZSS and the new Beidou 3 under examination. ISGNSS 2018, Sanur, Bali.

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Abstract

Nowadays one can use four global navigation satellite systems (GNSS). Two of them are complete constellations (GPS, Glonass) and two (Beidou, Galileo) are already usable and will be finish in the near future. Additionally satellite based augmentation systems (SBAS) like WAAS, EGNOS, GAGAN or QZSS complement the GNSS service. However, within all systems one can observe changes, modifications, and updates every year. This can be related to satellite renewables leading to signal property changes. Especially, for safety critical applications using GNSS, like advanced receiver autonomous integrity monitoring (ARAIM) or ground-based augmentation systems (GBAS) the new or changed Signal properties are of high interest. With the help of detailed information about the signal deformation and the received signal power it is possible to calculate realistic error bounds and consequently realistic protection level for these kinds of safety critical applications. This paper presents an overview of the findings according new signals or signal configurations of GPS, Beidou and QZSS of the last two years. After a brief introduction of the measurement facility the paper will introduce basic analysis about the quality of the signal shape in spectral and modulation domain. Using our precise calibrated measurement facility, we will also present an analysis of the transmitted satellite signal power including estimates about the power sharing among individual signal components within each band. Considering the measured power in relation to the boresight angle of the satellite one can derive a cut through the antenna pattern of the satellite and can assess the antenna symmetry properties. Examples for different satellites will be presented. Finally, we will end with a conclusion regarding the considered signal developments and its impact on GNSS users.

Item URL in elib:https://elib.dlr.de/127135/
Document Type:Conference or Workshop Item (Speech)
Title:Latest GNSS Signal in Space Developments GPS, QZSS and the new Beidou 3 under examination
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Thoelert, SteffenIKNhttps://orcid.org/0000-0003-4653-318X
Date:November 2018
Refereed publication:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:GPS, Flex Power, QZSS, BeiDou 3
Event Title:ISGNSS 2018
Event Location:Sanur, Bali
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben GNSS2/Neue Dienste und Produkte
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Thölert, Steffen
Deposited On:10 Apr 2019 12:25
Last Modified:10 Apr 2019 12:25

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