TAG: GNSS

AOGS Conference seeks abstract submissions

February 8, 2016By

The Asia Oceania Geosciences Society (AOGS) 2016 conference will be held in Beijing on July 31-Aug. 5. Abstract submissions are being accepted until Feb. 19. In particular, organizers are looking for papers for a session on GNSS positioning and atmospheric sounding. AOGS was established in 2003 to promote geosciences and its application for the benefit of humanity, specifically in Asia and Oceania and with... read more

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China launches 21st Beidou navigation satellite

February 1, 2016By
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China has launched its 21st BeiDou satellite into orbit, according to Xinhua News Agency, the official press agency of the People’s Republic of China. The launch took place at 3:29 p.m. Beijing Time (07:29 UTC) on Monday, Feb. 1. Launched from Xichang Satellite Launch Center in the southwestern province of Sichuan, the satellite was boosted by a Long March-3C carrier rocket... read more

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Prize for GNSS opinions

January 19, 2016By

Geomatics specialist Larry Tinney won the $50 gift card in our January drawing among takers of the Reader Poll. You can win too! Take the poll below by Feb. 22 to answer the question: What is the biggest challenge in simulating GNSS environments for testing products under development? All poll takers will be entered in a drawing for a $50... read more

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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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