Global Navigation Satellite Systems Engineering, Policy, and Design
While a representative for a proposed broadband network assured attendees at a recent satellite navigation meeting that their telecom system could co-exist with the Global Positioning System, a panel of GPS experts raised new doubts about the broadband system and interference from its handsets.
By Inside GNSS
Air Force Space Commander Gen. William Shelton at House Armed Services subcommittee hearingAmidst a storm of political controversy and the conspicuous absence of a key administration witness, Department of Defense (DoD) officials told members of Congress today (September 15, 2011) that a proposed broadband wireless service would degrade or render useless billions of dollars of equipment essential to military operations.
By Inside GNSS
In a remarkable change of momentum, the Federal Communications Commission (FCC) issued a public notice yesterday (September 13, 2011) stating that “additional targeted testing” is needed in the matter of LightSquared Subsidiary LLC’s interference to GPS.
By Inside GNSS
The Galileo In-Orbit Validation (IOV) ProtoFlight Model (PFM) and Flight Models (FM-2, FM-3 and FM-4) undergoing assembly and testing at Thales Alenia Space’s facility in Rome during May 2011. ESA – S. CorvajaThe first Galileo navigation satellite arrived Wednesday (September 7, 2011) in Europe’s Spaceport in French Guiana, ready to begin preparations for launch on 20 October.
Packed within its protective, air-conditioned container, the satellite — known as Known as Flight Model 2, or FM2 — landed at Cayenne Rochambeau Airport aboard an Antonov aircraft, having departed from Thales Alenia Space Italy’s Rome facility, where it was built.
By Inside GNSS
LightSquared told a congressional committee today (September 8, 2011) that it would limit the on-the-ground power of its signals to avoid overpowering GPS receivers, which use frequencies next door that the company proposes to have rezoned for its high-powered wireless broadband network.
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
CORS and OPUS for Engineers
Edited by Tomás Soler
PUBLISHED BY THE AMERICAN SOCIETY OF CIVIL ENGINEERS
Consumer demand for positioning information is currently being met by a plethora of wireless positioning technologies. The most popular consumer positioning technology, GNSS, is only one option along with several methods that use cellular networks to provide location, such as wireless local area networks (WLANs), wireless personal area networks (WPANs), radio frequency identification (RFID) tags, and ultrawideband (UWB) communications.
By Inside GNSS
FIGURE 1: Current availability in the Arctic with VAL=35 m and HAL=40m.The Arctic houses an estimated 90 billion barrels of undiscovered, technically recoverable oil and 44 billion barrels of natural gas liquids according to the U.S. Geological Survey. These potential energy reserves represent 13 percent of the untapped oil in the world.
By Inside GNSS
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
ICG Program Officer Sharafat Gadimova[Updated Sept 7, 2011] The United Nations and the United States will co-sponsor a special meeting to commemorate 10 years of achievement on the global navigation satellite systems on December 12-16, 2011 at the United Nations office Vienna International Center in Vienna, Austria.
The main discussion will center around the International Committee on GNSS (ICG), created by The UN Office of Outer Space Affairs (OOSA) in 2005 to bring together all system providers and smooth the way for global development of the satellite navigation systems.
By Inside GNSS
Scenic Jeju IslandThe third Asia Oceania Regional Workshop on GNSS will take place on Jeju Island, Korea on November 1 and 2, 2011.
Japan’s first Quasi-Zenith satellite "Michibiki" is now transmitting positioning signals and its technical and application verificationr results will be a major topic at this year’s event.
By Inside GNSS
