Opinions

All Betz are on: A satnav book review

February 10, 2016By
Betz-book-cover

There is something for everyone interested in satnav in this wonderful book, regardless of their level of involvement or sophistication with PNT. This book is a treasure trove for PNT engineers and satnav experts but it’s readability is such that even if you are only slightly curious about how space based PNT works, you will find it an educational and enjoyable read. read more

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Establishing orthometric heights using GNSS — Part 5

February 3, 2016By
Figure 9. Plot depicting the changes in adjusted heights due to constraining all published NAVD 88 leveling-derived orthometric heights except for station Phaniel (using GEOID12B) .

Basic procedures and tools for ensuring GNNS-derived orthometric heights meet the project’s desired accuracy
In the latest installment of our ongoing series, the focus switches from GNSS-derived ellipsoid heights to procedures and tools for ensuring GNNS-derived orthometric heights meet the project's desired accuracy. read more

GPS recruits: Uncle Sam wants your ideas!

January 27, 2016By
Uncle_Sam_(pointing_finger)

The GPS modernization funding picture cannot be called bright, yet neither can it be characterized as dim. While big money for big projects appears hard to come by, the U.S. government and military offer many smaller allocations to help fill the chinks in GPS armor. Such initiatives concern jamming, PNT solutions in GPS-denied environments and other conundrums. A run of... read more

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AUVSI to host massive trade show, works with US UAV regulators

January 20, 2016By
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The Association for Unmanned Vehicle Systems International (AUVSI) has renamed its major annual conference — XPONENTIAL — and the 2016 edition will be held in New Orleans at the Morial Convention Center on the west bank of the Mississippi, May 2–5. The huge convention center is hosting the event across two large halls, with more than 350,000 square feet of space for up... read more

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GPS aboard the world’s highest, fastest manned gliders

January 13, 2016By
NASA astronaut Scott Kelly floats aboard the International Space Station after the hatch opening of the Soyuz spacecraft Mar. 28, 2015. (Photo: NASA)

Featuring an exclusive interview with Astronaut Scott Kelly from aboard the International Space Station This month, we discuss sailplanes of all sorts and conduct a brief on-orbit interview with Astronaut Scott Kelly concerning his time piloting the space shuttle — actually a supersonic glider. We touch on the role GPS played in making it a safer rocket glider. Kelly also gives us... read more

Taking Position: Women in PNT extend a hand

January 12, 2016By
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A first-time gathering at ION GNSS+ gives mentors in the GNSS field an opportunity to help newcomers. By Tracy Cozzens Managing Editor I had the privilege of attending a unique and special gathering at ION GNSS+ this past September. The meet-and-greet event was Women in PNT, sponsored by the Institute of Navigation (ION), Spirent Federal Systems and NovAtel. “The idea... read more

Out in Front: Resilient navigation and timing

January 11, 2016By
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Advocacy in the U.S. capital urges augmentation of GPS/GNSS with eLoran and other “complementary terrestrial PNT services to increase resilience.” See the Resilient Navigation and Timing Foundation’s website, rntfnd.org. This is assuredly a good thing, a worthy cause. I’ve come to believe, however, that true resilience goes beyond what we normally think of as position and timing sensors. Stimulus comes... read more

Data is the crop: GNSS used by surveyors and farmers

January 6, 2016By
Photo credit: ViaMoi via Foter.com / CC BY-NC-ND

As technology continues to march forward, and storage and data evaluation use grows, the surveyor and the farmer will begin to use each other’s skillsets to increase their own productivity. So how do we get there? First, we must establish how each side uses their prospective GPS tools. read more