Global Navigation Satellite Systems Engineering, Policy, and Design
Willard Marquis is a senior staff systems engineer with the GPS IIR and GPS III Flight Operations Group, Lockheed Martin Space Systems Company.
By Inside GNSS
Budget storms have reappeared on the horizon and the fore¬cast for defense expenditures, including for the GPS program, is grim with a high probability of ugly.
By Dee Ann Divis
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.
By Inside GNSS
CORS and OPUS for Engineers
Edited by Tomás Soler
PUBLISHED BY THE AMERICAN SOCIETY OF CIVIL ENGINEERS
FIGURE 1: Simplified probe architectureGNSS vulnerability is rightly one of the most talked about topics of 2011.
By Inside GNSS
FIGURE 1: GPS III On OrbitIn May 2008, Lockheed Martin Space Systems Company received a contract from the U.S. Air Force to develop a new, third generation of GPS satellites. The GPS III space vehicle (SV) has been designed (Figure 1, see inset photo, above right) and is now being built to bring new future capabilities to both military and civil positioning, navigation, and timing (PNT) users throughout the globe.
By Inside GNSS
The 2011 Telematics@China conference and exhibition will be held at the Shanghai Marriott Hotel City Centre in Shanghai, China from Wednesday through Friday, December 7-9.
The annual event, which began in 2008, is sponsored by the Automotive Engineers of China (SAE-China) and supported by a number of government departments. The conference will feature 90 speakers from all sectors of the telematics industry. Organizers expect 1,000 attendees from China and the rest of the world.
By Inside GNSS
[Updated September 2, 2011] Amid White House efforts to keep a lid on the process and congressional hearings on the subject, the controversy surrounding LightSquared’s interference to GPS could compel the Federal Communications Commission (FCC) to require another round of testing — this time of the wireless broadband company’s lower L-band frequencies.
By Inside GNSS
Trimble BD920Trimble has introduced two new GNSS OEM modules, the BD910 and BD920, featuring centimeter-level, real-time kinematic (RTK) positioning capabilities optimized for high-precision and control applications.
The BD910 and BD920 modules are designed to allow OEMs and system integrators to easily add centimeter-level positioning to specialized or custom hardware solutions.
By Inside GNSS
Raytheon Corporation illustrationMembers of the Advanced Control Segment (OCX) team led by Raytheon Corporation are working through a series of issues that has delayed approval of a recent preliminary design review (PDR) on the key GPS modernization program.
By Inside GNSS
Do you use Topcon products in your daily life and work? If so, Topcon invites you to pick up your cell, your video camera or any other video recording device and show them what you do and how you do it.
Send in your two minute clip by October 1 – just point and shoot and upload, the company says.
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. AQUARIUS
Buenos Aires, Argentina and Vandenberg AFB, California, USA
