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About Steffen Thoelert

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Steffen Thoelert works at the German Aerospace Center (DLR).

Posts by Steffen Thoelert

First transmission of L1C/B by QZS-1R Posted on 08 Mar 2022 in the From the Magazine & GNSS categories.

By Peter Steigenberger, Steffen Thoelert, Sergei Yudanov and Markus Ramatschi The Japanese QZS-1R satellite was launched on Oct. 26, 2021, from the Tanegashima Space Center in Japan. It serves as... Read more»

GPS III ‘Magellan’ starts signal transmission Posted on 28 Apr 2020 in the From the Magazine & GNSS & Latest News categories.

By Peter Steigenberger, Steffen Thoelert, Oliver Montenbruck and Richard B. Langley The first GPS III satellite, “Vespucci,” was launched in December 2018, started signal transmission in January 2020, and was... Read more»

First light: Broadcast of L1C by GPS III Posted on 19 Mar 2019 in the From the Magazine & GNSS categories.

Less than three weeks after its launch, the first GPS III satellite, SVN74, started transmitting navigation signals. SVN74 uses the pseudorandom noise (PRN) code number G04 previously used by the... Read more»

Innovation: QZS-3 and QZS-4 join the Quasi-Zenith Satellite System Posted on 09 Feb 2018 in the From the Magazine & GNSS & Innovation categories.

Constellation completed
The first, or prototype, Block I QZSS satellite was launched in 2010 and, based on the positive test results from this satellite, an additional three satellites were launched in 2017, completing a four-satellite constellation. In this month’s column, we examine the recent developments of this unique and innovative navigation system. Read more»

QZS-2 signal analysis, QZS-3 launched Posted on 23 Aug 2017 in the GNSS & Opinions categories.

This month we bring you a guest column by Steffen Thoelert, André Hauschild, Peter Steigenberger and Oliver Montenbruck of the German Aerospace Center (DLR) and Richard B. Langley of the... Read more»