TAG: GNSS

Out in Front: Resilient navigation and timing

January 11, 2016By
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Advocacy in the U.S. capital urges augmentation of GPS/GNSS with eLoran and other “complementary terrestrial PNT services to increase resilience.” See the Resilient Navigation and Timing Foundation’s website, rntfnd.org. This is assuredly a good thing, a worthy cause. I’ve come to believe, however, that true resilience goes beyond what we normally think of as position and timing sensors. Stimulus comes... read more

12 GNSS birds for December, and a document under the tree

December 23, 2015By

Just what every satnav engineer wanted for the holidays: a new Interface Control Document to unwrap under the tree. On Nov. 30, the European Commission (EC) published version 1.2 of the Galileo Open Service Signal In Space Interface Control Document (OS SIS ICD v1.2). The document provides the information for receiver and chipset manufacturers, application developers and service providers to... read more

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Expert Opinions: How many GNSS signals for a consumer-grade device?

December 23, 2015By
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Question: What is the optimum number of GNSS signals to include/process in a consumer-grade PNT device? A: A chip should support four signals, being GPS/GLONASS/Galileo/Beidou, but only process two of them — choice depending on region, geopolitical sensitivity, constellation availability — dropping to one to save power when satellite availability is good. Two constellations give enough satellites for accuracy and... read more

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Seen & Heard: GNSS and PNT in the News

December 8, 2015By
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A snapshot of interesting stories involving GNSS and position, navigation and timing (PNT) technology from around the world. read more

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Research Online: HF beacon navigation, inertial sensors and GNSS-INS integration

December 8, 2015By

HF Beacon Navigation   Navigation using High-Frequency Ground Beacons and Ionosphere Model Corrections, by Yoav Baumgarten and Mark L. Psiaki, Cornell University. A new navigation concept relies on passive one-way ranging using pseudorange measurements of high-frequency (HF) beacon signals reflected off the ionosphere. This is being developed as a possible alternative to GNSS positioning and timing services, with benefits in... read more

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Expert Opinions: FAA UAV registration requirement

December 8, 2015By

Lydia Bock, Geodetics Inc., and John Studenny, Esterline - CMC Navigation Systems, answer the question, "What do you think of the FAA requirement that all UAV purchasers register their devices?" read more

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Out in Front: GLAC issues BeiDou market projections

December 8, 2015By
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We have grown accustomed to seeing market projections for some GNSS, notably Galileo. European GNSS Agency economists have done a remarkable job analyzing and predicting the global market over the past five years. Business intelligence firms in the U.S. periodically report on the power of GPS driving, or participating in, significant portions of the U.S. economy. Figures from Russia are... read more

Galileo 11 and 12 mission to launch Dec. 17

December 8, 2015By

Galileo satellites 11 and 12 will be launched atop of the legendary Soyuz rocket on Dec. 17 from Europe’s Spaceport in French Guiana. Ten years after the launch of GIOVE A, on Dec. 28, 2005, Galileo is now a reality. read more

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