GNSS

Multi-GNSS, multi-PNT testing: Q&A from our signal simulation webinar

September 6, 2016By

The “Signal Simulation and Testing: Fundamentals and New Frontiers” webinar, held March 10, generated in-depth Q&A, printed in part here. Inertial positioning can be tested with GNSS. Download full webinar free. Question: What is the toughest multi-constellation performance parameter to meet? John Fischer, Spectracom. In the multi-constellation environment, having to test for synchronization between the different constellation presents a challenge.... read more

This article is tagged with and posted in GNSS, Opinions

GNSS, radars assist in all-weather vehicle positioning

September 6, 2016By
vehicle-ADAS-fog

Everyone talks about the weather, but nobody does anything about it — right? Our lead authors this month are doing something about it. The July cover story of GPS World magazine was titled “See into the Smoke with Inertial.” This month’s feature could have been called “See into the Fog with CDGNSS,” but we just didn’t have room in the... read more

This article is tagged with , , , , and posted in GNSS, Opinions, Transportation

Innovation: Galileo cycle-slip detection

September 1, 2016By and
FIGURE 3.  Statistical and absolute thresholds.

How four frequencies help when the ionosphere is disturbed The authors explore how cycle slips in Galileo carrier-phase measurements can be more effectively detected using four frequencies. MORE SATELLITES OR MORE SIGNALS? That was the question put to the delegates at GNSS Election ’08, the stimulating and amusing entertainment provided at the GPS World Leadership Dinner held in conjunction with The... read more

Public meeting set for Navstar GPS documents

August 29, 2016By

The U.S. Air Force is holding a 2016 Public Interface Control Working Group and Open Forum for the Navstar GPS public documents Sept. 21-22 in El Segundo, California. The meeting is intended to update the public on GPS public document revisions and collect issues and comments for analysis and possible integration into future Navstar revisions. The forum will be held for the following documents:... read more

Expert Opinions: Buyers’ need for GNSS receiver testing, certification

August 29, 2016By
Dana-Goward

Q: Buyers get little guidance as to how specific receivers react to interference, particularly in critical infrastructure. Is there a need for receiver testing and certification along the lines of Underwriters Laboratories to guide purchase and acquisition? A: Exhaustive “seven-nines” testing and verification is expensive, takes a long time and stymies innovation. Yet simple and pragmatic testing can reveal faults... read more

This article is tagged with , , and posted in GNSS, Opinions

GPS anti-jam increasingly big business

August 29, 2016By

It’s getting bigger all the time, GPS/GNSS business. And coming along in its wake, starting to grow like a sproutly little brother, is GPS anti-jamming, to safeguard the signal in various scenarios. The anti-jamming market for GPS is expected to reach US$4.8 billion in value and 309.2 thousand units in volume by 2022, according to a newly released report by... read more

Sensonor supplies IMUs for NASA’s Raven and asteroid Scout

August 26, 2016By
nea-scout-1-piece-sail-O

Sensonor AS is partnering with NASA to supply current and future low- and near-Earth orbit space missions with inertial and gyroscope modules. The Norway-based company first began supplying its standard inertial measurement unit (IMU) and gyroscope modules for low Earth orbit (LEO) space applications in 2012, beginning with the launch of the NASA-sponsored AeroCube-4 satellite. Sensonor’s STIM300 and STIM210 inertial products are now... read more

System of Systems: Galileo birds active, faulty launch victims still viable

August 23, 2016By
Galileo orbits viewed from above.

Galileo birds active Faulty launch victims still viable Europe’s fifth and sixth Galileo satellites, salvaged from their faulty 2014 Soyuz launch, will begin broadcasting working navigation signals for test purposes, for the benefit of receiver manufacturers, service providers and scientific researchers. The European Commission will decide later whether the two satellites will become part of the operational Galileo constellation. The... read more

This article is tagged with , , , , , and posted in From the Magazine, GNSS