Opinions

BLM’s new GNSS protocols may set undesirable precedent

July 8, 2016By

Alaska. “The Last Frontier” is a fitting slogan for this great land. The rugged terrain and harsh winters make an environment that only the bravest inhabitants can stand. Here, one of the latest surveying battles is being fought; not between land owners, but within the professional surveying community itself and pitting technology against historical tradition. In the beginning… The United... read more

This article is tagged with and posted in Opinions, Survey

User location data could support satellite launches

June 23, 2016By

Let’s look through the other end of the telescope this month. The satellites are nattering along, lining up in orderly fashion at the rocket pad, extending their solar arms smoothly in space once they arrive on orbit. The constellations accrue and new signals inch closer to maturity. The only blips on the horizon come from Ligado’s terrestrial impulse and a... read more

Retailers, airspace, undetectable drones: UAV developments zoom ahead

June 17, 2016By

A lot is happening in the world of UAVs. Amazon and Walmart are making plans toward faster delivery of goods by drone, while TV dramas bring drones into their stories. And evaluation and test of technologies to protect airports and aircraft from unwanted drone incursions is picking up speed — while sense-and-avoid technology takes big steps forward toward integration of... read more

This article is tagged with and posted in OEM, Opinions, UAV/UGV

Expert Opinions: UAV PNT commercial requirements

June 13, 2016By

Q: What different requirements for UAV PNT performance will be seen as the market shifts from a military focus to commercial uses and users? A: PNT accuracy, availability and assurance will increase in importance. UAV payloads for military applications routinely require precise PNT information to geolocate sensor data for intelligence, surveillance and reconnaissance missions. High-end commercial applications for survey and... read more

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Prince’s death highlights 911 location issues

June 9, 2016By

By Tracy Cozzens Managing Editor Prince’s death on April 21 highlights a fatal flaw in the United States’ antiquated 911 emergency system. When you call from cell phone, 911 doesn’t automatically know where you are. 911 often can’t determine the location of an emergency, even when the call for help comes from a GPS-equipped smartphone. Often the 911 operator can only... read more

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Iridium and GPS revisited: A new PNT solution on the horizon?

June 8, 2016By

How many times have you heard of a nearly 20-year-old space constellation being modified with a new technology? It almost never happens. Get the details on Iridium's new Satellite Time and Location System. read more

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OS providers: 800-pound gorillas in PNT jungle

June 7, 2016By

It’s funny sometimes how things work out. I had just been preparing to take up in this column an issue raised last September at the ION-GNSS+ Plenary Session. Literally at the very moment I set pen to paper, notice of an extremely positive response to the problem arrived in my inbox. Hypercoincidental as it may be, market forces can and... read more

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Establishing orthometric heights using GNSS — Part 7

June 2, 2016By

Basic procedures and tools for determining valid NAVD 88 heights for constraints To date, the six parts of “Establishing Orthometric Heights Using GNSS” have provided the reader with basic concepts, routines and procedures for understanding, analyzing, evaluating and estimating GNSS-derived ellipsoid and orthometric heights. In Part 5 of this series, we discussed National Geodetic Survey’s NGS 59 guidelines and methods for evaluating the results... read more