GNSS

Lockheed Martin advances threat protection on GPS control segment

November 9, 2015By
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Security upgrades developed by Lockheed Martin for the GPS ground control system are now fully operational to safeguard data and ensure satellite availability. The GPS Intrusion Protection Reinforcement (GIPR) technology refresh is part of the Air Force’s strategy to modernize the current GPS system and to ensure the availability of its services for more than one billion global military, civilian and... read more

Galileo satellites set for year-long Einstein experiment

November 9, 2015By
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Europe’s fifth and sixth Galileo satellites — subject to complex salvage maneuvers following their launch in 2014 into incorrect orbits — will help to perform an ambitious year-long test of Einstein’s most famous theory. read more

Deadline for IGS Workshop Abstracts Is Nov. 25

November 9, 2015By

IGS Workshop 2016 will be hosted at the University of New South Wales in Sydney, Australia. The IGS invites the GNSS community to participate in a week of presentations, discussions, meetings and events with the theme of “GNSS Futures.” Abstracts are being accepted until Nov. 25. In particular, the co-chairs of the session “Scientific uses of IGS data and products” is... read more

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GLONASS-M Satellite Scheduled for Launch on Dec. 29

November 2, 2015By

The next GLONASS-M satellite will be launched on Dec. 29, according to Russian news agency TASS. GLONASS-M 51 will replace a satellite put into orbit in 2005, which has exceeded its design life by three years. The lifetime of a GLONASS-M is approximately seven years.  In addition, not earlier than February, a trio of GLONASS-M satellites is expected to be launched. GLONASS-M 51 is... read more

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Next-to-last GPS IIF satellite launched into orbit

November 2, 2015By
GPS IIF-11 Heads for space on Halloween.

The U.S. Air Force successfully launched its 11th and next-to-last Boeing-built Global Positioning System GPS IIF series satellite aboard a United Launch Alliance Atlas V 401 launch vehicle from Space Launch Complex 41, Cape Canaveral Air Force Station, Fla., on Oct. 31 at 12:13 p.m. EDT (9:13 a.m. PDT). GPS IIF satellites provide improved signals to support both the warfighter and the growing... read more

GPS IIF-11 Launch Delayed until Saturday

October 30, 2015By
Major General David Thompson announces a 24-hour delay for the launch of the eleventh GPS-IIF satellite.

Major General David Thompson, Vice Commander, U.S. Air Force Space Command, announced this morning that the GPS IIF launch scheduled for today will be delayed for 24 hours due to a water deluge suppression system at the launch site. Launch should only be delayed for 24 hours. The water deluge suppression system is a launch site safety issue. Officials made the call... read more

New BeiDou TMBOC Signal Tracked; Similar to Future GPS L1C Structure

October 28, 2015By
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China’s new third-generation BeiDou satellites are broadcasting some new signals in space. The newest signal, which just began broadcasting from a satellite launched on Sept. 30, is similar to the future GPS L1C signal with time-division BOC(1,1) and BOC(6,1) signals. Such a type of modulation is called time-multiplexed binary offset carrier (TMBOC, see note below). Researchers at JAVAD GNSS have... read more

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JAVAD GNSS TRE-3 Successfully Tracks First Live TMBOC Signal

October 22, 2015By
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The newly launched BeiDou Phase 3 satellites have several new signals. One is extremely similar to the future GPS L1C signal with time-division BOC(1,1) and BOC(6,1) signals. Such a type of modulation is called time-multiplexed binary offset carrier (TMBOC). (Read more about TMBOC in the June 2011 Innovation article “MBOC Signal Options: Performance of Multiplexed Binary Offset Carrier Modulations for Modernized... read more

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