November 25, 2012
Figures 4 & 5: Non-Gaussian Noises
Return to main article: "Non-Gaussian Noises"
By Inside GNSS
Global Navigation Satellite Systems Engineering, Policy, and Design
Global Navigation Satellite Systems Engineering, Policy, and Design
Return to main article: "Non-Gaussian Noises"
By Inside GNSS
The GPS program has taken a fiscal hit that will delay critical plans to begin multi-satellite launches and could ultimately hamper the Air Force’s ability to keep the constellation at its current level of service.
The shortfall is just one of the challenges facing the program over the next four months as the current six-month budget extension winds down, the government’s ability to borrow runs out, and, barring a fast political deal, the onerous budget cuts set up under sequestration kick in.
By Dee Ann Divis
Brussels View offers a European perspective on GNSS developments, particularly on Galileo.
Columnist Peter Gutierrez is based in Brussels, Belgium and has covered the EU satellite navigation programs from the inside out for several years. He received his bachelor’s degree from the University of Texas at Austin and an M.S. degree from the University of Massachusetts at Amherst.
By Peter Gutierrez
Say what you want about the European capitol — one thing is for sure, Brussels is alive with conversation. With corporate high flyers and political decision makers tripping over one another on their way to long lunch breaks and after-dinner drinks, the chitchat can flow fast and furious.
If one is not careful, idle conversation can turn into rumor and rumor become a “buzz.”
By Peter Gutierrez
Digital Satellite Navigation and Geophysics: A Practical Guide with GNSS Signal Simulator and Receiver Laboratory
by Ivan G. Petrovski and Toshiaki Tsujii
Cambridge University Press 2012
ISBN-13: 9780521760546
This textbook describes GPS and GLONASS signals, as well as geophysical theory necessary for high accuracy calculation of satellite and user positions. The book is accompanied a free academic version of software for a software receiver and signal simulator.
By Inside GNSS
View the Equations for this article
Various designs of inertial/GNSS integrated navigation systems exist, with different architectures depending on the quality of sensors, the mission, the dynamics of the vehicle, and the non-linearity of the dynamics model, measurement model, or both.
By Inside GNSS
Javier Ventura-Traveset introduces Navipedia at the Munich Satellite Navigation Summit on March 14, 2012. He is responsible for managing Navipedia’s development as well as GNSS education activities for ESA.Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.
In the last 30 years, satellite navigation applications have grown in number and kind, entire new systems have emerged, and existing systems have modernized.
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. NUMBER 3
Cape Canaveral, Florida USA
√ A third GPS IIF has arrived at Cape Canaveral and is being prepped for an October 4 morning launch. Two of the “follow-on” models with better clocks, trickster-foiling technology and more powerful signals are already up. Numbers four and five are waiting to go.
Return to main article: “Vector Delay Lock Loops”
By Inside GNSS
