NDGPS Destined for the Technological Boneyard

August 26, 2015By
"MARC AEM7s at BWI" by Ryan Stavely - Georgia_Trip_001. Licensed under CC BY-SA 2.0 via Commons.

Let us not exaggerate — nor prematurely announce — the death of a subsystem. However, the demise of the U.S. Nationwide Differential GPS (NDGPS) network can be confidently foretold. Although a Federal Register notice dated Aug. 18 merely seeks public comment on plans to shut down a large portion of NDGPS, the handwriting is on the wall. Once having writ,... read more

OPUS Unavailable this Weekend for Station Upgrade

August 20, 2015By

The Continuously Operating Reference Station network’s Silver Spring facility will be go offline starting at about 2 p.m. Eastern time Friday, but is expected to be back online by noon Sunday. “Our alternate facility will have full data holdings,” the National Geodetic Survey says on its CORS website. The shutdown is for a building-wide upgrade. The Online Positioning User Service... read more

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ComNav, CGEOS Build First BeiDou CORS Station in Europe

April 9, 2015By

Europe's first BeiDou CORS station — Qiao CORS Station — has been built in Wallonia, Belgium. ComNav partnered with local company CGEOS – Creative Geosensing on the project read more

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Geomatics Offers Portable Surveying and Mapping System

March 3, 2015By

Editor’s note: GPS World explored use of the new system from Geomatics in the March 2015 issue. Geomatics USA from Gainesville, Fla., has designed a precision surveying and mapping system that can be easily stowed in an overhead compartment for airline travel. Surveyors can fit everything needed for important mapping and surveying jobs into a baseball-style bag, including tripods. The compact, light-weight system offers differential sub-foot accuracy.... read more

Test Results from Real-Time CORS Streaming, Space Weather and NDGPS

May 16, 2013By

Being a person who enjoys spending time in the field using RTK and DGPS, I followed up on my column last month, “Sources of Public, Real-time, High-Precision Corrections,” with a trip to the field to test the NGS CORS Streaming service. About a month ago, I made a trip to Colorado to attend the Space Weather Workshop in Boulder, stop... read more

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Iraq on the Map: Installing Reference Stations for Accurate Engineering

March 1, 2011By

As a geodetic surveyor, I served in the U.S Army for 10 years. During that time, my team and I developed a nationwide GPS infrastructure system called the Iraqi Geospatial Reference System (IGRS). We installed Continuously Operating Reference Stations (CORS) and High Accuracy Reference Network Stations (HARNS), the first Iraqi owned and maintained system of its type. read more

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Sparse Network: Wide-Area, Sub-Decimeter Positioning for Airborne LiDAR Surveys

October 1, 2010By

The use of a precise wide-area positioning technique for airborne trajectory solutions for LiDAR surveys provides both relative and absolute accuracies similar to those derived from using a local GNSS reference station. read more

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