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About Oliver Montenbruck

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Oliver Montenbruck is head of the GNSS Technology and Navigation Group at DLR/GSOC. He also works at the German Aerospace Center.

Posts by Oliver Montenbruck

GLONASS CDMA signals now on L1, L2 Posted on 29 Apr 2024 in the Featured Stories & From the Magazine & Latest News categories.

GLONASS satellites traditionally use L1 and L2 frequency division multiple access (FDMA) signals. FDMA is characterized by a different transmit frequency for each satellite. Newer satellite generations also transmit an... Read more»

Inside the box: New NavIC clock outperforms previous generation Posted on 24 Sep 2023 in the Featured Stories & From the Magazine & GNSS & Latest News & Opinions categories.

NVS-01 is the first second-generation satellite of the Indian Navigation Satellite System (IRNSS), also known as Navigation with Indian Constellation (NavIC). Read more»

GNSS today: A four-leaf clover Posted on 18 Oct 2021 in the From the Magazine & GNSS categories.

By Oliver Montenbruck and Peter Steigenberger A year ago, the U.S. Global Positioning System celebrated its silver jubilee upon completing 25 years in operation. Also, it was more than 20... 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»

Innovation: Orbit determination of LEO satellites with real-time corrections Posted on 24 Apr 2017 in the Featured Stories & From the Magazine & Innovation categories.

Precision on Board
Described are the results of realistic simulations carried out to precisely position a low-Earth-orbit satellite using a source of real-time GPS corrections actually transmitted by a network of geostationary satellites. Even accounting for data outages, 3D positioning accuracies better than a decimeter have been obtained. Precision on board? Not right now but likely coming real soon. Read more»