Global Navigation Satellite Systems Engineering, Policy, and Design
Cooperative vehicle safety applications should preferably have two-meter horizontal accuracy and six-meter vertical accuracy, all with a 95-percent availability. The solution must be developed to incorporate lower-cost sensor options, specifically, lower-cost inertial measurement units that can be generally characterized by the gyro drift of 100 degrees per hour and an accelerometer bias force of twice its mass times gravity (two milligals).
By Inside GNSS
A GNSS signal simulator is mainly used to simulate GNSS signals transmitted by navigation satellites, propagated through the Earth’s atmosphere, and received by the receiver antenna. A simulator provides a convenient signal source for the test and validation of receiver function and performance and can also be used in GNSS experiments and studies of signal/data processing algorithms.
By Inside GNSS
[Updated June 30] Lucky you – you have three extra days to submit your GNSS application idea to the USA Challenge! The extended deadline is midnight Sunday (Europe) or 3 P.M. (Pacific time) on July 3.
Right now, some team is hard at work in a basement, an office, a dorm room or a lab. They are about to come up with a new, useful and commercially viable idea for a satellite navigation application or location based service.
By Inside GNSS
This colloquium will explore the implications of redefining UTC in astrodynamics, astornomy, geodesy, navigation, remote sensing and related fields.
By Inside GNSS
A schoolbus-sized asteroid grazed the Earth’s atmosphere around 1:00 P.M. (EDT) on June 27. It was 7,600 miles (12,300 km) away at its closest point, at which time it veered away across the South Atlantic Ocean.
It actually passed through the GPS constellation, alerting us to the vulnerability of our vital PNT space vehicles. We can now add asteroids to the the list of GNSS collision risks that already includes other satellites and space debris.
By Inside GNSS
The Symposium Gyro Technology has changed its name to Inertial Sensors and Systems because of the expanded focus and scientific topics covered at recent conferences. It will take place at the Karlsruhe Institute of Technology in Karlsruhe, Germany on September 21 and 21, 2011. The conference will be held in English.
By Inside GNSS
IFEN GmbH has begun shipping the first units of its new second-generation, multi-frequency and multi-GNSS software receiver — the SX-NSR.
The Poing, Germany–based company has also announced that the Galileo Test and Development Environment (GATE) facility that it instrumented and operates near Berchtesgaden for the German Space Agency (DLR) has been certified as a Galileo open-air test laboratory conforming to ISO 17025.
By Inside GNSS
A new report by the American Meteorological Society (AMS) highlights the vulnerability of GPS-dependent critical infrastructures to disruptions caused by solar flares and other space weather events, and sets forth a series of recommendations for building robustness of the GPS service.
Entitled “Satellite Navigation & Space Weather: Understanding the Vulnerability & Building Resilience,” the report is based on a workshop organized by the AMS and held October 13–14, 2010 in Washington, D.C.
By Inside GNSS
Spirent engineers will lead a two day training conference on the company’s simulation equipment at Hotel Oranje in Noordwijk, Netherlands on June 21 and 22 2011.
The conference will consist of 11 training sessions followed by 4 hands-on workshops.
Topics include:
By Inside GNSS
1. DON’T BLAME GPS
Humboldt-Tolyabe National Forest, Nevada USA
√ In the Pacific Northwest, in-car navigators often indicate “short cuts” through wilderness mountains—with tragic results. One victim survived 49 days before rescue in May. (Reports blamed GPS – not digital maps or wireless communication.) GPS.GOV straightens out misperceptions, for those who need a guardian angel, but just get a signal.
Space geodesy and its applications for geosciences and space exploitation is the theme of the APSG 2011 workshop. It will be held at the RMIT University in Melbourne on June 23-25.
By Inside GNSS
Uninterrupted continuous positioning technology is no longer a "nice to have" option but, for many applications, a "must have" requirement. Mobile devices increasingly rely on position/location functionality, and users have little tolerance for gaps in service.
By Inside GNSS
The second China Satellite Navigation conference will take place at Shanghai’s Expo Center on May 18-20, 2011.
The conference scientific chair is Prof. Sun Jiadong.
The aim of the conference is to build satellite navigation as an active academic field in China, to promote satellite system technology innovation and to strengthen the relationship between business and government for the advance of China’s Compass/Beidou system.
By Inside GNSS
