Popular Archived Series

The GPS Observer-Physical Geodesy 201.

By James P. Reilly Ph.D.
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The previous article in this series, “Physical Geodesy 101,” (POB August 2007) described the methods of collecting gravity measurements.
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The GPS Observer-Physical Geodesy 101.

By James P. Reilly Ph.D.
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Geodesy is not a dead science as some people think. GPS satellites are geodetic satellites. Their orbits have origins at the center of mass of the earth, and are tracked from stations located on a geodetic datum or reference frame.
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GIAA Mailbag

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Q: When I use my prism/antenna poles, I’ve noticed that some are easier to hold still than others. My dealer told me this is because the “bubble sensitivity” of one is higher than the other, with the more-difficult-to-hold pole having higher sensitivity.
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The GPS Observer-International GNSS and GPS updates.

By James P. Reilly Ph.D.
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This column includes updates on the Global Navigation Satellite System (GNSS) scene, as well as an update on U.S. Global Positioning System (GPS) satellites. It has been announced in various publications that both China and India are making plans to create their own GPS equivalents.
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GIAA mailbag

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This month we are highlighting a technique that a reader has been using for quite a while. Arthur J. Saarloos of Delta Junction, Alaska, sent it in hoping we would share it with the readership.
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The GPS observer-GLONASS and GPS Updates

By James P. Reilly Ph.D.
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An Update on GLONASS: Those of us who use satellite receivers for surveying can purchase a pair of receivers that process signals from GPS satellites only or from both GPS and GLONASS constellations.
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The GPS Observer

By James P. Reilly Ph.D.
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Everybody knows that when you take on a task, particularly a task in your line of work, you should understand what you are attempting to do. We gain much of this understanding through education.
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The GPS Observer

By James P. Reilly Ph.D.
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This past spring, I became a professor again when I was asked to teach "Satellite Geodesy" for the Department of Surveying Engineering at New Mexico State University.
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GIAA Mailbag

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When I used optical theodolites, I checked and adjusted the horizontal and vertical collimation myself. I noticed in my new total station's instruction manual that I only have 30 arc seconds or so of adjustment I can use. The manufacturer requires that I return it to an authorized service center for larger collimation adjustments. Why?
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GIAA Mailbag

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I know that the bubbles on my prism/antenna poles can go out of adjustment. How much of a problem is this? And how do I check them to see if they're in adjustment?
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HxGN Live

More than 3,500 attendees from more than 70 countries attended HxGN Live, the annual Hexagon AB user conference, at the MGM Grand Hotel & Casino in Las Vegas on June 3-6. About 450 keynotes and panel discussions were held, and several companies from around the world exhibited their geospatial products. Here are a few snapshots from the event.

9/30/14 2:00 pm EDT

Technical Workflows on the Job Site Using 3D Laser Scanning

The purpose of this webinar is to dig into different laser scanning workflows and techniques.

POB

POB September 2014

2014 September

In this September 2014 issue of POB, we take a look at a book that reveals how a rare-map dealer made millions stealing ancient maps. Also, discover the secrets of a 21st-century surveyor and how technology enables small surveying businesses to ease growing pains and maximize their potential.

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