GNSS

‘Flying for GPS': Memoir of a Pioneer Era — Excerpt

July 1, 2014By

Flying for GPS, a chronicle of Len Jacobson’s role in the development and promotion of the Global Positioning System, has just been published. The book spans a 50-year career, during which Jacobson flew 2.5 million miles as a missionary for GPS and as a developer of user equipment. He kept an extensive log of all of his flights, and it... read more

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CGSIC Releases GPS Interface Documents, Opens Registration

June 30, 2014By

Three new GPS Interface Specification documents have been issued by the Civil Global Positioning System Service Interface Committee: Navstar GPS Space Segment/Navigation User Interfaces (IS-GPS-200H, 24 Sep 2013) Navstar GPS Space Segment/User Segment L5 Interfaces (IS-GPS-705D, 24 Sep 2013) Navstar GPS Space Segment/User Segment L1C Interface (IS-GPS-800D, 24 Sp 2013) The new documents are posted on the NAVCEN GPS References... read more

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The System: GLONASS in April, What Went Wrong

June 24, 2014By
Figure 1. Affected broadcast messages for each GLONASS satellite. Colors indicate the different orbit planes.

By Gerhard Beutler, Rolf Dach, Urs Hugentobler, Oliver Montenbruck, Georg Weber, and Elmar Brockmann What Happened: On April 1, 2014, at 21:15 UTC, all GLONASS satellites started to transmit wrong Broadcast Messages (BM) as previously reported by GPS World. The satellite positions derived from these BM were wrong by up to ± 200 kilometers in each of the three coordinates... read more

ESA Recognizes First Galileo Navigation Fixes

June 23, 2014By
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Billions of satnav position fixes are performed daily, but determining your place in the world using Europe’s Galileo system is quite new. Because of this, in March the European Space Agency (ESA) offered to issue certificates for the first 50 Galileo fixes. Responses to the offer came from around the world. While half the applications came from Galileo’s home continent,... read more

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M3 Systems Announces Simulator Based on Vector Signal Transceiver

June 20, 2014By
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M3 Systems is now offering the StellaNGC multi-constellation GNSS simulator based on the National Instruments (NI) vector signal transceiver. The simulator is designed for the testing of satellite navigation receivers for GPS, GLONASS, Galileo, and EGNOS/WAAS. It is designed to improve performance, scalability, and versatility, and reduce cost over existing navigation test solutions. GNSS is the predominant technology today for... read more

EuroGeographics to Create Expert Group in GNSS Positioning

June 20, 2014By

Members of EuroGeographics are creating a European platform for networking, sharing best practices, and exchanging expertise on GNSS positioning. Plans for the new Positioning Knowledge Exchange Network (KEN) were revealed at the association’s recent Extraordinary General Assembly following a proposal by the Head Office for Geodesy and Cartography, Poland. Its focus will include: maintaining a network of experts in satellite... read more

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Russia Launches Single GLONASS Satellite

June 16, 2014By
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A single GLONASS-M satellite was launched from the Plesetsk Cosmodrome on Saturday, June 14, at 17:16 UTC. The satellite, GLONASS-M 55 (with designation 755 once operational and also known as Kosmos 2500), was inserted into the GLONASS constellation’s Plane 3 and will occupy orbital slot 21, according to ISS Reshetnev, the manufacturer of the satellite. Reshetnev also reported that the... read more

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Lockheed Misses GPS III Deadline After Production Delays

June 13, 2014By

The U.S. Air Force is shopping for alternative companies to head  the GPS III program after its current contractor, Lockheed Martin Space Systems, hit production delays, according to the Denver Post. There have been technical problems with the first GPS III satellite navigation system, which is supplied by Lockheed Martin subcontractor Exelis, the newspaper reports. After the current eight-satellite contract... read more

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