Global Navigation Satellite Systems Engineering, Policy, and Design
A new method for multipath rejection employs a multicorrelator-based GNSS receiver with an extended Kalman Filter (EKF) as an iterative solver, replacing the conventional delay locked loop (DLL) code tracking. The technique significantly reduces the positioning error and has low complexity. It can therefore be implemented in a real-time processing environment.
The EU Agency for Space Programme (EUSPA) awarded Thales Alenia Space a contract to provide new capabilities to the European Geostationary Navigation Overlay Service (EGNOS) satellite-based augmentation system.
By Inside GNSS
Europe’s Certifiable Localisation Unit with GNSS in the railway environment (CLUG) has moved the continent towards a cost-efficient train tracking solution based on satellite technology together with other sensors and data.
By Inside GNSS
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.
By Inside GNSS
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.
Orolia received two contracts to provide atomic clocks for the first 12 satellites of the Galileo Second Generation System (G2S).
By Inside GNSS
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.
By Inside GNSS
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.
The European Commission and the European Space Agency (ESA) selected Leonardo’s hydrogen atomic clocks for Galileo Second Generation.
By Inside GNSS
The French company Geoflex demonstrated GNSS corrections-driven centimetric positioning in Brazzaville, Republic of Congo on July 8, at the national Stadium Alphonse Massamba-Debat. The demo employed a dual-frequency GNSS chipset receiving GPS and Galileo signals and the Geoflex corrections service via the Nigerian NIGCOMSAT-1R satellite on L Band
By Inside GNSS
An interview with Ignacio Fernández Hernández, Galileo Authentication and High Accuracy Service Manager, European Commission.
By Peter Gutierrez
Testing of the first pair of Galileo Batch 3 satellites at the European Space Research and Technology Centre (ESTEC) was completed in April, and they are now in storage on site. Three more new Galileo satellites have since arrived from OHB in Germany
By Inside GNSS
Work on the Galileo EU Defence (GEODE) program began earlier this year when a consortium of 30 organizations from 14 European Union (EU) member states met to initiate “the biggest Galileo application development project ever launched” and “one of the most ambitious defense cooperation projects launched under the umbrella of the European Defence Industrial Development Programme (EDIDP),” according to consortium leader FDC.
By Inside GNSS
