About Peter Steigenberger

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»

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»

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»

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»

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»

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»

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»

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»