SBAS and RNSS

IRSO Launches 104 Satellites From a Single Rocket
February 20, 2017

IRSO Launches 104 Satellites From a Single Rocket

Last week the Indian Space Research Organization (ISRO) put a record 104 satellites into orbit with a single launch, and now it’s preparing to launch Geosynchronous Satellite Launch Vehicle Mark III (GSLV Mark-III) in a few months. 

India’s Polar Satellite Launch Vehicle, in its thirty-ninth flight (PSLV-C37), launched the 714 kilogram Cartosat-2 series satellite for earth observation and 103 co-passenger satellites together weighing about 663 kilograms at lift-off into a 505-kilometer polar Sun Synchronous Orbit (SSO).

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By Inside GNSS
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ESA Puts Brave Face on Galileo Clock Failures
January 19, 2017

ESA Puts Brave Face on Galileo Clock Failures

Passive hydrogen maser atomic clock of the type flown on Galileo, accurate to one second in three million years. ESA photo

At the traditional January media briefing in Paris yesterday (January 18, 2017), European Space Agency (ESA) General Director Jan Woerner was forthright in laying out the knowns and unknowns about the failed rubidium and hydrogen maser clocks onboard orbiting Galileo satellites, clocks that are absolutely crucial for accurate positioning.

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By Inside GNSS
GNSS Hotspots | November 2016
November 30, 2016

GNSS Hotspots | November 2016

One of 12 magnetograms recorded at Greenwich Observatory during the Great Geomagnetic Storm of 1859
1996 soccer game in the Midwest, (Rick Dikeman image)
Nouméa ground station after the flood
A pencil and a coffee cup show the size of NASA’s teeny tiny PhoneSat
Bonus Hotspot: Naro Tartaruga AUV
Pacific lamprey spawning (photo by Jeremy Monroe, Fresh Waters Illustrated)
“Return of the Bucentaurn to the Molo on Ascension Day”, by (Giovanni Antonio Canal) Canaletto
The U.S. Naval Observatory Alternate Master Clock at 2nd Space Operations Squadron, Schriever AFB in Colorado. This photo was taken in January, 2006 during the addition of a leap second. The USNO master clocks control GPS timing. They are accurate to within one second every 20 million years (Satellites are so picky! Humans, on the other hand, just want to know if we’re too late for lunch) USAF photo by A1C Jason Ridder.
Detail of Compass/ BeiDou2 system diagram
Hotspot 6: Beluga A300 600ST

Highest altitude fix for a GPS signal, GNSS timing signals and hacking the Grid, Eagles act as drone countermeasures and rumors of a GNSS-nano-chip contributes to cash crisis in India

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By Inside GNSS
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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
Baska.jpg
November 14, 2016

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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