A: System Categories

Europe Launches Galileo Navigation Satellite Quadruplets

Europe Launches Galileo Navigation Satellite Quadruplets

Didier Faivre, director of the Guiana Space Center, overseeing launch of four Galileo satellites. Screen capture of launch video by European Space Agency/ArianeSpace.

A modified Ariane 5 rocket lifted four Galileo satellites into orbit today (November 17, 2016) following an 8:06 a.m. (EST) launch from the European Space Center in Kourou, French Guiana.

The Galileo satellites reached their target altitude, after a "flawless release" from the new dispenser designed to handle four satellites, according to the European Space Agency (ESA). The dispenser released the first pair three hours and 25 minutes after liftoff, while the second separated 20 minutes later.

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By Inside GNSS
Congress Likely to Delay Action on Budget Items, Affecting GPS
November 16, 2016

Congress Likely to Delay Action on Budget Items, Affecting GPS

Congress is back in Washington with a December 9 deadline to pass the 2017 Fiscal Year (FY17) federal budget and avoid a government shutdown.

Lawmakers are widely expected to pass another continuing resolution, or CR, leaving the final decisions on the FY17 budget until after President-elect Donald Trump takes office in January — an approach that could both help and hurt the Pentagon’s GPS modernization effort.

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By Dee Ann Divis
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NASA to Launch Satellite-Based GNSS Hurricane Watch

NASA to Launch Satellite-Based GNSS Hurricane Watch

NASA plans to launch the Cyclone GNSS (CYGNSS) hurricane mission aboard a Pegasus XL rocket on December 12 from Cape Canaveral Air Force Station in Florida. CYGNSS, which is NASA’s first Earth science small-satellite constellation, will help improve hurricane intensity, tracking, and storm surge forecasts, the agency said.

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By Inside GNSS
NASA Breaks Guinness World Record for Highest GPS Altitude Fix

NASA Breaks Guinness World Record for Highest GPS Altitude Fix

NASA’s Magnetospheric Multiscale (MMS) mission broke the Guinness World Record for highest altitude fix of a GPS signal, the agency announced this week. The MMS satellites, operating in a highly elliptical orbit, set the record at 43,500 miles above the Earth.

The four MMS satellites incorporate GPS measurements into their tracking systems for position and orbit calculations to guide tight formations, NASA said.

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By Inside GNSS
ION GNSS+ 2017
November 15, 2016

ION GNSS+ 2017

Abstracts for the ION GNSS+ 2017 conference will be accepted online through March 10, 2017. The conference and industry exhibition covering all aspects of satellite navigation technology will take place September 25-29 at the Oregon Convention Center in Portland, Oregon USA.

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By Inside GNSS
A Short History of Radio Waves and GPS: Parkinson Receives Marconi Prize

A Short History of Radio Waves and GPS: Parkinson Receives Marconi Prize

Probably no one else could have accomplished Brad Parkinson’s bravura performance at the joint meeting of the Stanford PNT Symposium/Marconi Society earlier this month: in the morning sketch a “short history” of radio waves from Marconi to GPS  and in the evening recount a brief retrospective on the Global Positioning System from its prehistory in the 1960s to its future in the 21st century.

And in between moderate a panel of past Marconi Fellows, among whom Parkinson is the latest addition.

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By Inside GNSS
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Baska.jpg

11th RIN Baška GNSS Conference

The 11th RIN Baška GNSS Conference will take place May 7 – 9, 2017, in Baška, Krk Island, Croatia, organized jointly by The Royal Institute of Navigation (London, UK), Faculty of Maritime Studies (University of Rijeka, Croatia), and the Faculty of Transport and Traffic Sciences (University of Zagreb, Croatia), with technical co-sponsorship from Beihang University of Aeronautics and Astronautics (Beijing, China).

The abstract deadline is February 6, 2017. Please contact Renato Filjar.

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By Inside GNSS
ION JNC - Joint Navigation Conference 2017
November 13, 2016

ION JNC – Joint Navigation Conference 2017

The deadline for abstracts for the 2017 JNC is February 15, 2017. Submit yours here.

The annual Joint Navigation Conference is a military positioning, navigation and timing (PNT) event hosted by the Institute of Navigation on behalf of the U.S. Department of Homeland Security. It will be held at the Dayton Convention Center in Dayton, Ohio and the Air Force Institute of Technology at Wright-Patterson Air Force Base nearby.

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By Inside GNSS
Satellite Selection

Satellite Selection

Equations

The advent of multiple constellations provides the opportunity to eliminate geometry weakness as a source of satellite-based augmentation system (SBAS) unavailability. GPS users occasionally encounter areas where an insufficient density of satellites exists to support all desired operations. This most often occurs when a primary slot satellite is out of service. However, adding one or more constellations easily compensates for this geometric shortcoming. In fact, we may now experience the opposite problem of having more satellites that can be tracked by a receiver.

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By Inside GNSS
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