Category Archives: GNSS/Location Tech

cummins

The Clock(s) at the Center of the Universe

To provide precise global time, critical to our digital world, the United States Naval Observatory serves as the major node in a worldwide array of synchronized atomic clocks For all but a relatively few astronomers and scientists, the universe of humans centers around our earthbound activities and our heuristic sense of time – day, night, seasons,...

Figure 1 A control traverse example.

I Don’t Need No Stinkin’ Statistics

This entry is part 6 of 8 in the series xyHt in print May 2015Surveying Statistics, Part 1 Do you perform GNSS surveys? Do you use OPUS or perform RTK surveys simply because you don’t understand your software’s output? Do you always use the compass-rule adjustment for traverse data simply because that’s the way you...

The new storage tank inspection tool in RealWorks

Time to Do More

xyHt has been watching a recent flurry of news releases and webinar announcements from Trimble tagged with the slogan “Time to Do More.” There were quite a few major new products and enhancements announced so we wondered: Was this simply a marketing campaign? Or was this some new direction for Trimble? We decided to ask...

This Google Earth view of Wilkes-Barre, Pennsylvania, shows marks for the corners and standard parallels for the low-distortion projection.

Transformation of Observations, Part 4

This entry is part of 8 in the series xyHt in print April 2015Single Project Factor Here concludes a four-part series of articles about transformation of observations, spanning from September and December 2014 to March 2015. Part 1 covers how to transform surface observations into a geocentric coordinate system so that they can be compared...

Boeing K65438

Tracking Aircraft in Flight

This entry is part 4 of 8 in the series xyHt in print April 2015From surveillance methods using ground-based radar to space-based systems, it’s more complex to track aircraft than you might think. The disappearance of Malaysia Airlines Flight 370 on March 8, 2014, with 239 people on board, was both tragic and stunning. The...

RFID tags take many forms. The inside of a tag shown above— designed to attach to metal infrastructure in harsh environments, such as water pipes and valves—has a thin copper “bow-tie” antenna with a minuscule chip in the middle. It’s shown contrasted with a grain of rice.

RFID

This entry is part 5 of 8 in the series xyHt in print April 2015Above: RFID tags take many forms. The inside of a tag shown above—designed to attach to metal infrastructure in harsh environments, such as water pipes and valves—has a thin copper “bow-tie” antenna with a minuscule chip in the middle. It’s shown...