September 19, 2019

GNSS Transceiver: Simulation Accuracy Assessment of Using a Vector-Tracking Receiver as RF Constellation Simulator

In this article, the authors use a vector tracking approach to convert a software receiver into a software transceiver, showing that this effort is both feasible and easily realized. The basic concept is presented with an accuracy assessment of the error sources and generated signal quality is compared to theoretical lower limits.

Brussels View: Lessons to Be Learned From Galileo Signal Outage

July 2019 was a difficult month for the Galileo program. A system-wide technical failure that took a week to resolve was compounded by a communications breakdown that dismayed its supporters. For the European Commission, the road back will be difficult, but it is a road worth traveling.

By Peter Gutierrez

September 18, 2019

GNSS & The Law: Collecting and Processing Geolocation Data

UNDER THE EUROPEAN GENERAL DATA PROTECTION REGULATION

Geographical information plays a permanently increasing role in our society. More and more devices and applications use and process geographical information to serve all kinds of purposes. Smartphones, cars, e-bikes, scooters or foot shackles for law enforcement purposes collect and process geographical information on a permanent basis. Here, we take a close look at privacy issues and the data protection perspective, namely considering the European GDPR and experiences gained one year after its entry into effect.

Human Engineering: Ivan Revnivykh

Ivan Revnivykh’s life and experience encompass the far frontiers of his homeland, Russia, from the magnificent landscapes of the country’s Pacific coast to research stations in Antarctica, to the great capital city of Moscow where he lives and works today. To everything he does he brings a sense of excitement and adventure.

By Peter Gutierrez

Washington View: Ultra-Wideband Re-Emerges As GPS Interference Issue

Ultra-Wideband Re-Emerges As GPS Interference Issue

Seventeen years after federal regulators restricted a promising wireless technology to protect GPS and other spectrum users, they are being asked to loosen those limitations. Ultra-Wide Band (UWB) proponents insist the strictures are too tight and cut off their ability to innovate.

By Dee Ann Divis

August 17, 2019

New-Age Satellite-Based Navigation STAN: Simultaneous Tracking and Navigation with LEO Satellite Signals

Today’s vehicular navigation systems couple global navigation satellite system (GNSS) receivers with an inertial navigation system (INS). Low Earth orbit (LEO) satellite signals are a particularly attractive INS aiding source in GNSS-challenged environments.

By Zak Kassas et alia

August 13, 2019

Perceived Environment Aided GNSS Single Point Positioning: An Example Using LiDAR Scanner

GNSS positioning is strongly challenged in urban canyon areas. The signal reflection induces multipath and non-light-of-sight (NLOS). These signal blockages and reflections are caused by the obstacles of signal transmission between the satellites and receiver.

By Weisong Wen, Li-Ta Hsu

August 12, 2019

GPS Combined With Galileo to Provide Robust Timing for the Financial Sector

Today, more and more integral fields of application including banking and finance, telecom networks and electricity grids, rely heavily on accurate, reliable, and traceable signals for time and synchronization.

By Ricardo Píriz, et al

August 7, 2019

Ligado Presses For Decision on Frequencies Neighboring GPS

Ligado Networks is pushing spectrum regulators to make a decision on its request to allow satellite frequencies near the GPS band to also be used for terrestrial 5G networks.

By Dee Ann Divis

June 17, 2019

Iridium Next LEO Satellites as an Alternative PNT in GNSS Denied Environments – Part 1

The problem of Position Determination based on Low Earth Orbit (LEO) satellites signal of opportunity in uncovered and denied GNSS areas such as oceanic regions, north regions and deserts can be significant one. How to maintain tracking information of airlines especially during distress and emergency? To achieve that, a new design for Search and Rescue (SAR) positioning information is developed. Position and speed of the transceiver could be estimated based on distributed Doppler information fusion from LEO satellites.

By Hamza Benzerrouk

June 15, 2019

Design and Evaluation of Integrity Algorithms for PPP in Kinematic Applications

Novel protection level formulas, combining RAIM with solution separation and Precise Point Positioning, are applied to static, automotive, and flight scenarios. The authors of this article demonstrate that protection levels below 2 meters are achieved with reduced computational loads.

By Kaz Gunning

June 4, 2019

Working Paper: Processing Options  for the E6B Signals

With the rethinking of the Galileo Commercial Service (CS), the E6B signal will disseminate Precise Point Positioning (PPP) corrections whereas the E6C component will be encrypted for authentication purposes. Different processing options for the E6 signals are investigated and it is shown that the sensitivity gap between data and pilot processing can be bridged by introducing non-coherent integrations and inter-frequency aiding. Extended integrations mitigate the impact of noise while inter-frequency aiding reduces the dynamics perceived by the E6B tracking loop.

By Daniele Borio and Melania Susi

June 3, 2019

Avoiding Future GPS – Week Rollover Concerns

In the past few months, there have been articles in the press providing information and misinformation in advance of the GPS week rollover that occurred on April 6. Readers were warned to retire obsolete receivers, update software, check with manufacturers, and even perform testing of critical devices.

By John W. Betz

GNSS World

Galileo Hits the Spot: Testing GNSS Dual Frequency with Smartphon...

Detecting and Geolocating Jammers and Spoofers Using Integrated A...

GNSS Transceiver: Simulation Accuracy Assessment of Using a Vector-Tracking Receiver as RF Constellation Simulator

Brussels View: Lessons to Be Learned From Galileo Signal Outage

Human Engineering: Ivan Revnivykh

Washington View: Ultra-Wideband Re-Emerges As GPS Interference Issue

Ultra-Wideband Re-Emerges As GPS Interference Issue

New-Age Satellite-Based Navigation STAN: Simultaneous Tracking and Navigation with LEO Satellite Signals

Perceived Environment Aided GNSS Single Point Positioning: An Example Using LiDAR Scanner

GPS Combined With Galileo to Provide Robust Timing for the Financial Sector

Ligado Presses For Decision on Frequencies Neighboring GPS

Iridium Next LEO Satellites as an Alternative PNT in GNSS Denied Environments – Part 1

Design and Evaluation of Integrity Algorithms for PPP in Kinematic Applications

Working Paper: Processing Options  for the E6B Signals

Avoiding Future GPS – Week Rollover Concerns