Category Archives: GNSS/Location Tech
What’s Inside Your GNSS Rover? Part 3
The third and final installment of a look at the inner workings of high-precision surveying rovers. In parts one and two, which appeared in the two previous issues, we focused on antennas, amplification, housing, channels, boards, and gates. This installment continues with signal matching, positioning engines, and additional components. Matching Signals To distill the observed...
What’s Inside Your GNSS Rover? Part 2
The second installment of a three-part look at the inner workings of high-precision surveying rovers. In Part One of this series (xyHt magazine, September 2023 issue) we focused on the antenna, amplification, and housing elements of rovers. This installment continues with channels, boards, and gates. Channels There is a lot of misunderstanding about what receiver...
Why Opus Projects? Part 2 of 2
OPUS Projects Streamlines Submitting GPS Surveys to National Geodetic Survey By Philippe Hensel with Dan Gillins, Dan Martin and Julie Prusky “Texas Special Reference Center (TSRC) of Conrad Blucher Institute is leading the efforts toward modernization of the horizontal and vertical datums in the State of Texas, particularly in the subsidence zone in southeast Texas....
Why Opus Projects? Part 1 of 2
Part 1 of 2The new version of the NGS suite of Online Position User Service tools simplifies many tasks By Philippe HenselWith Dan Gillins, Dan Martin and Julie Prusky NOAA’s National Geodetic Survey (NGS) continues to improve its suite of Online Position User Service (OPUS) tools. In addition to single-point processing, OPUS offers a web-based...
What’s Inside Your GNSS Rover? Part 1
The venerable GNSS rover, has evolved into an essential part of a surveyor’s toolkit, although some mystery remains as to what that magic box does and how it does it. To demystify this, we engaged GNSS engineers to help craft this three-part “explainer” series. Part one The work of a surveyor requires a lot of...
HAS Potential
Free and Global: The new high accuracy positioning service (HAS) of the Galileo constellation and its advantages for GIS and asset mapping If you consider field mapping applications, such as for GIS, asset inventory and management, and field operations for utilities, how wonderful would it be to have sub-foot positioning in real time, with no...