Global Navigation Satellite Systems Engineering, Policy, and Design
The joint exploitation of meta-signals received from multiple GNSS satellites, and from one or multiple antennas, can achieve high-accuracy PNT solutions in harsh propagation conditions.
A new methodology targets sub-meter GNSS accuracies in the consumer realm for applications such as augmented reality and visually impaired navigation. Recent Android RTK smartphone services in a real-time environment achieve accuracies below 50 cm. Can these be matched with PPP?
By Inside GNSS
Galileo Through the Lenses of Money, Defense, Brexit and Unfortunate Events
The year of our European correspondent generally begins with two predictive events: the ESA New Year press breakfast in Paris and the EU Space Policy Conference in Brussels. It’s a tough job but somebody’s got to do it.
By Peter Gutierrez
After years of delay, we see movement toward a back-up service for PNT and ensuring that critical infrastructure owners and operators take steps to limit vulnerabilities.
By Dee Ann Divis
Three different low-cost sensor integrations, covering vehicle navigation in a range of environments, were explored and explained in the February webinar, “Automotive-Grade GNSS + Inertial for Robust Navigation.” The full webinar, slides and audio, is available for download now.
Knowledge gained in close study of post-processed GNSS/INS data from very high-dynamic aerial maneuvers can improve position monitoring in machine control, precision agriculture and other industrial applications.
Hours before an impending government shutdown, the President signed both the defense appropriations and authorization bills on December 20. The bills funded nearly all of the Air Force’s GPS program but made substantial cuts in Army GPS receiver development.
By Dee Ann Divis
GNSS jamming and spoofing continue to draw keen audience interest at the hottest, coolest and even the most obscure tech, trade and public policy conferences. Speakers can now recount any number of real-world spoofing incidents where GNSS users have been fooled by tech wunderkind, unwitting technology demonstrators and even enemy regimes.
By Peter Gutierrez The long-running fight between the GPS community and Ligado Networks intensified in the final months of 2019, fueled by a draft regulatory order, a flurry of letters and scrutiny of the sale of a high-profile supplier.
By Dee Ann Divis
For driverless vehicles, current GNSS meter-level positioning accuracy still serves for lane-level detection. However, hazardous misleading information poses a serious, disruptive and critical safety concern.
By Inside GNSS
Microelectromechanical systems (MEMS) play an essential role in automotive electronic control systems, providing measurements for tire pressure monitoring, vehicle stability control, adaptive suspension, rollover protection systems, and navigation systems. While MEMS gyros and accelerometers are suitable for vehicular applications in terms of size and cost, noise properties (large bias and signi cant 1/f noise) create problems, especially in low dynamic conditions or when measurements are integrated from angular rates to angles or from acceleration to velocity and position. GNSS receivers can complement these measurements but the availability and accuracy drops in urban canyons and underground.
By Inside GNSS
By Inside GNSSIn lead position on a sleigh rising from the North Pole to a height of 200 meters — standard cruising altitude for global package delivery — at 2100 hours UTC on December 24 — the youngest will hopefully be asleep by then and there’s plenty of territory to cover before dawn breaks, time’s a-wasting — navigator Rudolph will see between 40 and 45 GNSS satellites glistening in the night sky.
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