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 GPS World Tech Talk is a new blog where industry professionals and academics talk tech about GPS and GNSS systems, receivers, and applications. Every month, three new blogs are posted by international experts. Join us!
— Dorota Brzezinska, Forum Moderator |
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| GPS III: All That Remains is the Official Word
| | With rumors swirling about which company got the contract, the Wall Street Journal identifying the supposed contractor, and a Department of Defense under secretary having signed off, all that remains is for the U.S. Air Force to tell which company will build the first GPS III satellites. |
| | GIOVE-B to Ground Control: Do You Read?
| | | Yes we do, says the European Space Agency (ESA). Following its April 27 launch, GIOVE- B, the second Galileo satellite, began transmitting navigation data on May 7, the ESA reported. |
| | U.S. DOT Plans to Continue Inland NDGPS Ops — For Now
| | | The U.S. Department of Transportation (DOT) has approved a decision to continue the inland component of the Nationwide Differential GPS (NDGPS), based on the results of a user assessment conducted by the Research and Innovative Technology Administration (RITA). |
| | Galileo's GIOVE-B Successfully Attains Orbit
| | | The second Galileo demonstration satellite, GIOVE-B, successfully lifted off in the early morning hours of April 27 and subsequently reached its target orbit, the European Space Agency (ESA) says. |
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 | | Perspectives — April 2008
| | GPS World's intrepid editor in chief filed this month's newsletter from Toulouse, France, home of CNES, the French Space Agency, and site of this week's European Navigation Conference. | | |
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 | Innovation: Improving Long-Range RTK
| Getting a Better Handle on the Biases
| | | How accurate modeling of atmospheric effects coupled with an ionosphere-free ambiguity resolution process results in successful long-range RTK. |
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 | Galileo Validation
| | | The GIOVE-A satellite broadcast Galileo's first signals on January 12, 2006. GIOVE-B is scheduled for launch on April 14, 2008. The authors describe generation of the first Galileo navigation messages, operational and performance aspects, and signal improvements. Some improvements have been already identified, and their implementation is ongoing. |
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| Bringing All GNSS into Line
| | | The introduction of new GNSSs requires updating the AGPS-only solution to add support for new GPS bands, new GNSSs, and to enhance accuracy, sensitivity, and availability. |
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 | Apples to Apples
| | | Many products have similar performance specifications, but specified performance and measured performance can vary widely. Here, the authors describe how a standard methodology precisely defines acquisition, tracking, and reacquisition, using specific input signals to test each quantity. |
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 | Innovation: Ubiquitous Positioning
| | | The UbiComp concept has spawned smart coffee pots, smart printers, smart copy machines and the like, all connected via a wired or wireless network. For a UbiComp device to know its position anywhere and anytime, we need "ubiquitous positioning" or UbiPos. This article looks at the available technologies that might be used to supplement conventional GPS positioning and some initial testing that will eventually lead to a UbiPos world. |
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