Global Navigation Satellite Systems Engineering, Policy, and Design
»NovAtel Inc. wingsuit video
In 1589, at the age of 25, Galileo Galilei toiled up the 294 steps of a 55-meter bell tower in Pisa, Italy, where he was tutoring math students at the time.
According to his pupil and later biographer, Vincenzo Viviani, Galileo carried with him two cannonballs, one twice the weight of the other. When he reached the top of the tower, he went to the lower balcony of the tilted structure and dropped the two balls simultaneously.
By Inside GNSS
In the latest in a series of GPS modernization contracts, the U.S. Air Force Space and Missile Systems Center has awarded Raytheon Company a $27.4 million contract to develop a GPS Launch and Checkout System (LCS), which will provide early launch and checkout of GPS III satellites starting with the first GPS III launch in 2014.
By Inside GNSS
The U.S. Air Force has awarded Lockheed Martin a $238 million contract for production of the third and fourth satellites in the next-generation GPS constellation, known as GPS III. The acquisition of the next two GPS IIIA satellites at one time will allow the Lockheed Martin-led team to maximize efficiencies in satellite manufacturing.
By Inside GNSS
The U.S. Air Force has awarded Lockheed Martin a $21.5-million contract to provide a launch and checkout capability (LCC) to command and control all GPS III satellites from launch through early on-orbit testing.
By Inside GNSS
[Updated January 3, 2012] China released a long-awaited “test version” interface control document (ICD) for its Compass (BeiDou-2) GNSS system today (December 27, 2011). The 11-page publication covers its open B1 civil signal centered at 1561.098 MHz.
By Inside GNSS
Spirent Communications has launched of a subscription service for live GNSS (GPS, GLONASS, and QZSS) environmental-capture data set samples, recorded at major locations worldwide, in challenging urban and suburban conditions.
The data sets are designed for use with the company’s GSS6400 GNSS Record and Playback test System. They encompass a variety of recorded scenarios ranging from drive-through multi-level roads, tunnels, and car parks to drive-throughs in downtown areas with high-rise buildings.
By Inside GNSS
The Lockheed Martin team developing the U.S. Air Force’s next-generation GPS satellites (GPS Block III) has delivered the program’s pathfinder spacecraft to the company’s Denver, Colorado–area facility.
The program remains on schedule for a 2014 launch of the first Block III space vehicle (SV).
By Inside GNSS
Return to main article: “Network RTK and Reference Station Configuration”
By Inside GNSS
1. Portland, Oregon and Los Angeles, California USA
TWINS!
Return to main article: "True3D HUD Wins Global SatNav Competition"
Many technologies are created before their best applications are even thought about. This leads to a business phenomenon known as “technology push” in contrast to “consumer pull.” The True3D Volumetric HUD technology did not share this path.
By Inside GNSS
No sooner had GPS positioning helped validate key aspects of Einstein’s general theory of relativity in the Gravity Probe-B program than GPS timing has been cited as helping bring his special theory of relativity into doubt.
At issue is the so-called OPERA (Oscillation Project with Emulsion-tRacking Apparatus) experiment, inaugurated in 2006 with the main goal of studying the rare transformation (oscillation) of muon neutrinos into tau neutrinos.
By Inside GNSS
Europe’s first two Galileo satellites have reached their final operating orbits, opening the way for activating and testing their navigation payloads.
Marking the formal end of their launch and early operations phase (LEOP), on November 3, control of the satellites was passed from the CNES French space agency center in Toulouse to the Galileo Control Center (GCC) in Oberpfaffenhofen, Germany.
By Inside GNSS
Please.
Please. Please. Please.
Can we please talk about something besides LightSquared?
Not yet? You mean, they are still here?
And we have so many other GNSS-related topics that deserve comment:
Some peculiar cuts in civil GPS funds and GPS III budgets being proposed by congressional committees.
A re-examination — aka analysis of alternatives — of GPS and PNT options in general. Space weather and an impending solar max. Warrantless GPS-aided tracking before the Supreme Court.
By Inside GNSS
