Global Navigation Satellite Systems Engineering, Policy, and Design
In an Android developers’ blog post titled “Improving urban GPS accuracy for your app,” satnav expert and a principal engineer at Google Frank van Diggelen reports that the company has addressed “the last great unsolved GPS problem”: the wrong-side-of-the-street position error.
By Inside GNSS
On Monday, December 14, the EU’s Galileo program posted an official notice advising users that Galileo service was degraded on all satellites until further notice. Nominal service was then resumed about six hours later.
By Peter Gutierrez
As 2020 comes to a close, the Ligado Networks LLC’s (Ligado) mobile satellite services (MSS) project remains at a standstill. While actions in the Federal Communication Commission (FCC) proceedings in the case have stagnated, Congressional action, funds and filings have flowed.
By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
Hexagon | NovAtel has released the new MarinePak7 GNSS+inertial receiver that delivers precise positioning and timing for demanding nearshore marine applications. It is certified for the marine environment and designed for hydrographic survey, marine construction and nearshore renewable energy operations.
By Inside GNSS
The Space and Missile Systems Center’s (SMC) Production Corps gained Operational Acceptance of GPS Military-Code (M-Code) Early Use (MCEU) in November, and the first sale of M-code equipment to a U.S. ally abroad was made in September.
By Inside GNSS
For decades, artificial intelligence and machine learning have advanced at a rapid pace. Today, there are many ways artificial intelligence and machine learning are used behind the scenes to impact our everyday lives, such as social media, shopping recommendations, email spam detection, speech recognition, self-driving cars, UAVs, and so on.
By Inside GNSS
The Indian Regional Navigation Satellite System (IRNSS) has been accepted as a component of the World Wide Radio Navigation System (WWRNS) for operation in the Indian Ocean Region by the International Maritime Organization (IMO).
By Inside GNSS
China’s BeiDou satellite navigation system has passed an assessment of critical standardization work at the International Civil Aviation Organization (ICAO), state broadcaster China Central Television (CCTV) reported, citing the Chinese civil aviation authority and China Satellite Navigation Office.
By Inside GNSS
The second of a two-part article explains how an initial system using existing Earth-GNSS constellations may be augmented with dedicated lunar orbiting satellites as well as lunar beacon ranging sources. A gradual deployment leads to a full autonomous lunar navigation system.
The advent of large LEO constellations is a game-changer for navigation. A key feature of these constellations is their potential to allow simultaneous measurement of Doppler shifts from a large number of satellites.
The SiriusXM satellite radio network now broadcasts GNSS corrections from Trimble’s RTX service. New cars sold in the contiguous U.S. and Canada equipped with SiriusXM’s Gen8 satellite chipset will be able to receive RTX GNSS corrections, without the need to access a cellular network, thus enabling high-accuracy positioning, a key component of autonomous on-road applications.
By Inside GNSS
Alstom, a French rail rolling stock manufacturer, has integrated certified data fusion algorithms for fail-safe train localization, using position and speed of trains based on GNSS data coming from multiple constellations including Galileo.
By Inside GNSS
A framework to seamlessly navigate people from urban road traffic to indoor foot traffic uses the phone’s inertial measurement unit, GNSS chipset and camera, aided by an extended Kalman filter and ORB-SLAM. Tests show the framework performing well in both phases, guiding the phone’s user, behind the wheel on a city street, to a spot in an underground parking garage and walking to a meeting inside a large building.
