Global Navigation Satellite Systems Engineering, Policy, and Design
Wireless local area networks (WLANs), popularly known as Wi-Fi, were originally designed for data applications. Over the past decade or so, WLAN infrastructure has been implemented for high-speed wireless Internet access in homes, “hot-spots,” university campuses, and corporate buildings. Hundreds of millions of Wi-Fi access points (APs) are deployed in major urban areas worldwide.
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First Block IIF Satellite (Boeing)[updated Februaary 16] The first Block IIF satellite is undergoing final launch preparations after arriving at Cape Canaveral Air Force Station in Florida aboard a Boeing-built C-17 Globemaster III airlifter.
Space Vehicle 1 (SV-1), the first of 12 GPS IIF satellites for the U.S. Air Force, will lift off on a United Launch Alliance Delta IV vehicle later this year, with the first launch window in mid-May.
By Inside GNSS
AsteRx3 Receiver from SeptentrioSeptentrio has launched the AsteRx3, a compact multi-frequency GPS/GLONASS/Galileo and Compass/Beidou-ready receiver.
AsteRx3 is specially designed for integration in demanding precision positioning, navigation, and automation applications such as land and maritime survey, machine control, and unmanned aerial vehicle (UAV) payloads.
By Inside GNSS
Inside the LM Space Vehicle Integration Laboratory. Lockheed Martin photoLockheed Martin has announced that its new Space Vehicle Integration Laboratory (SVIL) near Denver, Colorado, has achieved initial operational capability and is supporting the company’s satellite development program activity, including the production run of the next-generation GPS IIIA spacecraft.
By Inside GNSS
Aerial view of ESA-ESTEC facility at Noordwijk, The Netherlands. ESA photo by A. Van Der GeestRené Oosterlinck, the European Space Agency’s director of the Galileo program and navigation-related activities, and company representative signed the first three contracts for the Galileo full operational capability (FOC) phase on January 26. The event marks the official start of building the Galileo operational infrastructure.
By Inside GNSS
The European Commission (EC) has announced the award of three of the six contracts for the procurement of Galileo’s initial operational capability (IOC), including a €566-million (US$811.2-million) award to OHB System AG for a first order of 14 satellites.
By Inside GNSS
The 24th international congress of the International Federation of Surveyors will take place at the Sydney Convention and Exhibition Centre in Sydney, Australia.
The FIG 2010 keynote speech will be given Monday morning, April 12 by Tim Flannery,
2007 Australian of the Year. He will speak
about climate change, drawing on his book, The Weather Makers: How Man Is Changing
the Climate and What It Means for Life on Earth, which debuted on
The New York Times bestseller list.
A frequently asked question about GPS is: How accurate is a GPS-based position? The experienced GPS user knows that a big difference lies between using pseudoranges alone or combining pseudoranges and carrier phases.
The following analysis is partly based on an idea raised in the book, Global Positioning System: Signals, Measurements, and Performance, by P. Misra and Per Enge (See Additional Resources section at the end of this article).
By Alan Cameron
Back in 1999, the European Union decided to set up a global satellite navigation system (GNSS), known as Galileo, for civil and commercial use. Early 2010 the European Commission awarded the contracts for Galileo’s first satellites, launchers and support services. In 2011 the European system will finalize its validation phase. As a result, the initial service provision of Europe’s satellite navigation system could start as of early 2014.
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The New Year’s festivities had ended and satellite operators at the 2d Space Operations Squadron (2 SOPS) at Schriever Air Force Base, Colorado, were hard at work conducting routine operations on the GPS satellites. At around 11:30 in the morning local time (1830 UTC) on January 1, 2004, range errors for space vehicle number (SVN) 23 began to rapidly drift above the 30-meter threshold.
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Block IIF satelliteThe U.S. Air Force GPS Wing and the 50th Space Wing will implement a new ground system software release on January 11 to enable telemetry, tracking, and commanding for the new GPS IIF satellites and provide over-the-air distribution of encryption keys for military user P(Y)-code equipment.
The software will be implemented by the GPS Master Control Center at Schriever AFB, Colorado.
Meanwhile, the schedules for launching the first IIF spacecraft and awarding the prime contract for modernization of the GPS operational control segment (OCX) continue to slip.
By Inside GNSS
The European Commission (EC) announced today (January 7) the award of three of the six contracts for the procurement of Galileo’s initial operational capability (IOC), including a €566-million (US$811.2-million) award to OHB System AG for a first order of 14 satellites.
By Inside GNSS
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