Global Navigation Satellite Systems Engineering, Policy, and Design
For the complete story, including figures, graphs, and images, please download the PDF of the article, above.
Knowledge of carrier-to-noise ratio (CNR) can be of great value in the context of GNSS.
By Inside GNSS
FIGURE 1: Single- and multi-channel simulators, GPS/Galileo (on top) and GPS/GLONASS software receiver USB front end with controlled power sourceFor the complete story, including figures, graphs, and images, please download the PDF of the article, above.
Testing procedures comprise an important element in the development, manufacturing, and integration of GNSS devices. Essentially, everybody involved in GNSS will be involved in or affected by testing at one time or another.
By Inside GNSS
For the complete story, including figures, graphs, and images, please download the PDF of the article, above.
The decades of successful exploitation of satellite navigation systems GPS and GLONASS have confirmed their unique status as a basic resource for reliable worldwide, all-weather, all-season, round-the-clock positioning and timing. Nevertheless, the permanently widening sphere of their practical applications — as well as challenging requirements emerging from potential new users — give these systems a momentum for further evolution and progress.
By Inside GNSS
For the complete story, including figures, graphs, and images, please download the PDF of the article, above.
By Inside GNSS
With the launch of the Delta IV rocket on May 27 from Cape Canaveral Air Force Station the first satellite (space vehicle number 62 or SVN62) of the latest GPS generation Block IIF (F, for “follow-on”) was carried into earth orbit — a major step with roots in the past.
Eight years ago in August 2002 the United States decided in coordination with the International Telecommunication Union (ITU-R) to transmit a new civil signal on a third frequency known as L5.
By Inside GNSS
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
1. HERE KITTY, KITTY
Nassau County,New York USA
√ IEEE Spectrum blogger Mark Spezio attached a GPS logger to his wandering cat, whose complex journeys centered on a mouse-hunting paradise: Nassau County Storm Water Basin Storage Area. The cat was amazed to see Mark show up at his secret hideaway.
See cat and maps here
By Inside GNSS
Return to main article: "EASY Suite II: easy17 & easy18"
By Inside GNSS
Return to main article: "EASY Suite II: easy17 & easy18"
By Inside GNSS
Only a decade ago, but a world away: 2000.
The last year of the old century that everyone thought was the first of the new.
When flying was still a delight, rather than a worrisome bother.
When the expected — a global Y2K bug–bitten IT meltdown — didn’t happen, and the much-anticipated but still-unexpected did: the United States turned off GPS selective availability.
By Inside GNSS
