Opinions

ION GNSS+ Preview: UAVs, Indoor Location and a Shark!

August 19, 2015By
The show floor at ION-GNSS 2014.

The Institute of Navigation (ION) GNSS+ conference Sept. 14-18 covers issues such as PNT privacy, includes a new UAV session, and brings back the popular indoor navigation demonstrations with a significantly larger group of companies demonstrating. read more

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L2C and Next-Generation Smart PNT Receivers

August 12, 2015By
SVN49 in space  (artist’s rendering).  The signal anomaly from SVN 49 alerted researchers to new possibilities in analysis and monitoring.

Are you using a legacy-model PNT (position, navigation and timing) receiver or a smart PNT receiver, and why does it matter? Don’t have a clue? Read on! Hint — L2C and CNAV (civilian navigation message format) are the major reason it matters. Yes, it’s all because of L2C, the controversial GPS civilian signal that seems to always be in the news and just... read more

Out in Front: Oh, the Wonder

August 6, 2015By
Katharine’s cruising over the past year.

Of it all. Of the broad expanse of the world and all its inhabitants, its layers, its depths and heights, the atmospheric mantle in which it wraps itself, its floating mountains of ice and its solid soaring peaks of rock and snow, its savage predators, and all its shades of human endeavor. Every August we marvel at the many applications of global positioning science, at real-world instances of hardware and software in the service of humankind and of Gaia itself. read more

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Establishing Orthometric Heights Using GNSS — Part 2

August 5, 2015By
Figure 2. NAD 83 (2011) Network Design for Stations EA0873 and EA0875. [Note: GNSS Vectors for GNSS projects GPS 1588 and GPS 2057 were provided by NGS].

GNSS-derived ellipsoid heights are the basis for GNSS-derived orthometric heights, so it makes sense to make these ellipsoid heights as close to error free as possible. This article will discuss guidelines for detecting, reducing andr eliminating error sources in ellipsoid heights. It will focus on guidelines for establishing accurate ellipsoid heights in a local geodetic network. (Part 2 of a series) read more

German Auto Consortium Set to Buy Nokia Map Unit

July 23, 2015By

The value of accurate maps is not lost on the automotive industry as it transitions from connected cars to automated vehicles. Three German automakers are rumored to be making a multibillion-dollar investment in Nokia’s HERE mapping division. If the deal goes through as expected by late July, Nokia, which purchased HERE (then called Navteq) for $8 billion in 2007, will have spurned... read more

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Phones Allow Surreptitious Geo-Tracking

July 23, 2015By
Janice Partyka

Not everyone wants to be located. Consumers think they have the ability to turn off the tracking ability of their phones. But can they? More about that later. In other news, there are good reasons why Nokia’s HERE mapping is still on the selling block. And blind people are using a no-tech version of a widely used location positioning method that... read more

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To L2C or Not to L2C? That Is the Operational Question.

July 22, 2015By

Half of the GPS constellation now transmits the new civil signal, L2C. In a matter of weeks, that number will crest into the majority of the constellation when IIF-10 is set active and operational to users. By the end of the year or early 2016, look for 18 usable satellites transmitting L2C. That could be considered a nominal initial operating... read more

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