Global Navigation Satellite Systems Engineering, Policy, and Design
The European Satellite Navigation Competition (ESNC) 2011 opened its registration page on April 1 for entries in this year’s international search for new GNSS applications and product developments.
This year’s competition offers business start-up aid worth €1 million ($1.4 million) and a cash prize pool of €100,000.
By Inside GNSS
NovAtel FlexPak6NovAtel Inc. has announced the launch of its FlexPak6 GNSS enclosure, the first product to house the company’s new OEM628 multi-constellation receiver.
According to the Calgary, Alberta, Canada–based company, the 120-channel FlexPak6 is designed for easy integration into new user equipment and is capable of tracking all current and upcoming GNSS satellite signals, including GPS L1/L2/L2C/L5 (code and carrier phase), GLONASS L1/L2, Galileo E1/E5a/E5b/Alt-BOC, Compass/BeiDou-2 and satellite-based augmentation systems.
By Inside GNSS
Omnistar DGPS world mapTrimble announced on March 16 that it has entered into a definitive agreement to acquire certain assets related to the OmniSTAR GNSS signal corrections business from Fugro N.V.
The acquisition is expected to significantly expand Trimble’s worldwide ability to provide correction services for a broad range of land-based applications in addition to OmniSTAR’s current focus in agriculture. Fugro’s offshore marine business is unaffected.
By Inside GNSS
Backed by a $17-million, nine-year publically funded budget, Korea has launched an inter-institutional National GNSS Research Center (NGRC) with an ambitious agenda of projects to advance the Asian nation’s role in the field.
By Inside GNSS
Q: Does the magnitude of the GNSS receiver clock offset matter?
A: It is well known that GNSS receiver clocks drift relative to the stable atomic time scale that ultimately defines a particular GNSS system in the first place. GNSS receiver manufacturers, however, try to limit the magnitude of the time offset to within some predefined range.
By Inside GNSS
For the complete story, including figures, graphs, and images, please download the PDF of the article, above.
Integer carrier-phase ambiguity resolution is the key to fast and high-precision GNSS positioning and navigation. It is the process of resolving the unknown cycle ambiguities of the carrier-phase data as integers. Once this has been done successfully, the very precise carrier-phase data will act as pseudorange data, thus making very precise positioning and navigation possible.
By Inside GNSS
Equation: signal variance for a “ring of scatterers” modelIndoor GNSS propagation environments are characterized by multiple reflected signal paths (multipath) terminating at the receiver. Consequently, the received signal’s amplitude, phase, and perceived angle of arrival attributes vary randomly as the receiver moves. This has created significant interest among receiver designers and manufacturers to develop powerful processing for GNSS handsets such that these can operate effectively in indoor faded environments.
By Inside GNSS
Figures 1 & 2For the complete story, including figures, graphs, and images, please download the PDF of the article, above.
Growing dependence on GNSS for positioning, navigation, and timing (PNT) has raised a parallel concern about the potential risks of signal interference. The popular press has recently highlighted accounts of car thieves using GPS jammers, solar flares pumping out L-band radiation, and faulty television sets causing havoc to GPS receivers across an entire harbor.
By Inside GNSS
Figure 1 & Table 1For the complete story, including figures, graphs, and images, please download the PDF of the article, above.
Recent years have seen GPS receivers built in as a standard feature in many consumer products. A growing number of mobile phones, personal navigation devices, netbooks and tablets are equipped with GPS receiver chips and navigation software that enable consumers to navigate from A to B or find their nearest coffee shop. According to Berg Insight, annual shipments of GPS-equipped mobile phones are estimated to reach 960 million devices in 2014.
By Inside GNSS
Galileo Test and Development Environment (GATE) Photo: iFENThe 2011 International Summer School on GNSS will take place July 20 to July 30 at the GATE facility in Berchtesgaden, Germany. GATE is the German Galileo Test and Development Environment that opened in February.
By Inside GNSS
The International Committee on GNSS (ICG), is a voluntary United Nations–backed association that brings together GNSS and augmentation providers — including the United States, Russia, European Union, China, India, and Japan — and associate members representing key user communities.
By Inside GNSS
The 18th International Conference on Integrated Navigation Systems will take place at Central Scientific & Research Institute "Elektropribor" in St. Petersburg on May 30-June 1, 2011.
By Inside GNSS
