Opinions

New developments in UAV navigation and control

April 19, 2017By

Since we’re running essentially a navigation magazine, someone had the bright idea that maybe we could bring together the monthly review of UAS/UAV activities combined with some hint of navigation content. Seems reasonable. So delving into the academic world once more, we’ve been searching for prior papers that address novel ways for divining where a UAV might be and how it... read more

Expert Opinions: Trending technologies for UAV navigation

April 19, 2017By

Q: Where is leading technology trending for UAV navigation in complex, unstructured, and uncertain (GNSS-denied) environments in industrial applications? A: Tight integration between GNSS and inertial navigation systems (INS) can provide accurate, reliable navigation in GNSS-challenged environments, and advances in MEMS inertial technology continue to push the performance of systems that meet the size, weight and power requirements for UAV... read more

Anti-jam technology: Demystifying the CRPA

April 12, 2017By

Controlled reception pattern antennas (CRPAs, pronounced “serpers”), adaptive antennas, null-steering antennas, beamforming antennas… You’ve probably heard of at least one of those terms in any discussion around GPS anti-jam technology for defense. Because they are all terms that describe essentially the same thing: a specialized antenna that helps protect GPS receivers from interference and jamming. But what exactly are they? Where... read more

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Backpacks for enhanced work travel, efficiency

April 12, 2017By

It’s conference season again. Every year I struggle with the best way to tote my MacBook Pro, DSLR camera and all the acoutrements I haul around as part of my job. No doubt you, too, need to travel with expensive electronics you want to protect from damage or theft. Determined to find the best solution for my trip in May... read more

A look at NGS’ GPS on benchmarks program in Alaska

April 5, 2017By

The last column, February 2017, focused on addressing the following questions: (1) Is the large GPS on benchmarks residual due to an issue with the NAVD 88 orthometric height or the NAD 83 (2011) ellipsoid height? and (2) Should stations with large GPS on benchmarks residuals be included in the development of NGS’ hybrid geoid models? The column provided suggestions... read more

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What have you been up to in the world of PNT?

March 29, 2017By

Do anything interesting today? Specifically, did you do something interesting involving positioning, navigation or timing (PNT)? GPS World is always on the look-out for case studies — stories of how you, our readers, used PNT or GNSS equipment, or applied related technologies, to solve a problem. Each month in our Market Watch and Updates sections, I try to include a... read more

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Is it time for backup?

March 27, 2017By

“It’s always been time.” That was the first answer out of the gate, given in Session 3 of the Munich Satellite Navigation Summit last month. Dominic Hayes, Spectrum Management and Policy for Galileo, EGNOS and Copernicus at the European Commission, was prompt off the mark. “GNSS is so good, so easy and so cheap, other means are falling out of... read more

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Top-level updates from Munich summit on four GNSS

March 22, 2017By

Here’s a panorama in broad strokes across the range of GNSSs, garnered from top system spokespersons at the Munich Satellite Navigation Summit. It’s been several years since breaking news was aired at this annual late winter/early spring event, but it’s always good for a wide-ranging update, recalibrating levels, so to speak. GPS. With 31 operational satellites (24 is baseline) and... read more