Galileo Archives - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

Galileo

September 14, 2021

Italy and Qascom to Land First GNSS Receiver on the Moon

A 2023 lander in the moon’s Mare Crisium will carry the first GNSS receiver to that planet’s surface: the Navigation Early Investigation on Lunar surface (NEIL) receiver with software-defined radio (SDR) technology. The receiver will spring from agreements between the U.S. National Aeronautics and Space Administration (NASA), the Italian Space Agency (ASI) and the Italian firm Qascom srl.

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By Inside GNSS

Are Elliptical Galileo Satellites Usable for RTK?

Galileo satellites 5 and 6 (E18, E14) were declared unusable in February 2021 after reports indicating repeatable daily problems with RTK. This article explores the possible impact of deviant elliptical orbits on the performance of RTK and finds that there is no reason to expect any anomalies caused by high orbit eccentricity per se. Thus there is no reason to declare the satellites unhealthy.

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By Inside GNSS
August 3, 2021

New Galileo G2 Payloads Hit the Testing Beds

Testing of the first Galileo Second Generation (G2) hardware has begun, with versions of the satellites’ navigation payloads and antennas undergoing evaluation to check whether they meet the ambitious performance levels set for the coming generation of Europe’s GNSS.

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By Inside GNSS

GNSS Interference Mitigation: Modulations, Measurements and Position Impact

Interference mitigation techniques should protect GNSS receivers from interference and jamming without biasing their final position, velocity and timing solution. This column analyses five popular interference mitigation techniques, including the Adaptive Notch Filter (ANF) and Pulse Blanking (PB), evaluating their impact on pseudoranges and on the final position and timing solution. Several GNSS modulations are considered, showing the advantage of using GNSS signals with similar spectral characteristics.

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By Inside GNSS
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