GNSS

New Version of gfzrnx RINEX 2/3 Tool Ready for Testing

May 5, 2015By

The next version (0.93) of the “gfzrnx” RINEX-2/3 Tool is now available. Because of user feedback, the developers have fixed bugs and have added these new features: strict epoch interval handling via -sei command line parameter support of the upcoming RINEX version 3.03 (BDS B1 obs. types, IRNSS support) The software is still in a beta state, according to the GFZ IGS... read more

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First GPS III Satellite Ready for Harsh Environment Testing

May 4, 2015By
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Using a 10-ton crane, Lockheed Martin engineers and technicians gently lowered the system module of the U.S. Air Force’s first next generation GPS III satellite into place over its propulsion core, successfully integrating the two into one space vehicle. The April systems integration event brought together several major fully functional satellite components. The system module includes the navigation payload, which... read more

The System: All Systems Go, with a Spring into Space

May 1, 2015By

Planet Earth gained five new navigation satellites in late March, for four satellite systems. GPS. The U.S. Air Force’s ninth GPS Block IIF satellite (GPS IIF-9) launched on March 25 from Cape Canaveral, Fla. The IIF-9 rode aboard a Delta IV rocket, the workhorse of the GPS fleet for successful launches. The satellite was declared operational on April 21. “Many... read more

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Out in Front: Good News for Modern Nav

May 1, 2015By

This year’s European Navigation Conference in Bordeaux, France, got underway with “Good news from up there .…” Galileo’s seventh and eighth satellites launched successfully in late March, the European Space Agency (ESA) plans four more satellites to reach orbit in 2015, and space maneuvers for Galileo 5 and 6 have been completed, with a recovery plan currently under study. ESA... read more

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Expert Advice: A Leap Second — One More Time!

April 30, 2015By
From left: Dennis McCarthy, Wayne Hanson, Ronald Beard and William Klepczynski

Once again we are going to adjust the world’s clocks by one second. This time it will happen on June 30, when we insert another leap second in Coordinated Universal Time (UTC), the standard international time scale. In theory, all UTC clocks should insert a second labeled 23h 59m 60s (the leap second) following one labeled 23h 59m 59s UTC. This is equivalent to having all of the clocks in the world stop for one second at that time. Are you ready for it? read more

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GNSS Students Sought for ESA Summer School

April 28, 2015By

Students still have time to join the ESA International Summer School on Global Navigation Satellite Systems, which will take place in Barcelona, Spain, at the end of August. The 10-day course — lasting from the afternoon of Aug. 31 to the morning of Sept. 10 — will cover all aspects of satellite navigation, up to and including the creation of a satnav-based business.... read more

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Happy 20th Anniversary, GPS!

April 24, 2015By
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The Global Positioning System marks its 20th year of operation on Monday, April 27. Below is a timeline showing important milestones in the 20 years since the constellation reached full operational capability (FOC) on April 27, 1995. FOC was formally announced on July 17, 1995.   GPS Operational History Timeline read more

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60 Minutes Segment on AFSPC Set for Sunday

April 24, 2015By
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CBS’s 60 Minutes will air a special two-part segment on Air Force Space Command (AFSPC) this coming Sunday, April 26, reflecting a broad array of AFSPC missions — launch, satellite operations, missile warning, acquisition, and the Joint Space Operations Center. The GPS Directorate is a joint service effort directed by the United States Air Force and managed at the Space and Missile Systems Center... read more