TAG: DGPS

Nationwide Differential GPS Shutdown Proposed, Comments Sought

August 18, 2015By
oceantides

An Aug. 18 Federal Register notice proposes shutting down the Nationwide Differential Global Positioning System (NDGPS) in January 2016 because of a decline in its use, except for sites in coastal areas. The notice, issued by the U.S. Coast Guard (USCG), Transportation Department (DOT) and Corps of Engineers (USACE), reads: The Nationwide Differential Global Positioning System (NDGPS) service augments GPS... read more

Webinar Follow-up Q&A: SBAS, DGPS or Post-Processing? Which Should You Use?

January 31, 2011By

Last week, I conducted a webinar along with Dr. Michael Whitehead titled "SBAS, DGPS or Post-processing? Which Should You Use?" It was one of the best webinars I've conducted to date. We barely squeezed it into 65 minutes and could have kept going for the better part of two hours, given the subject matter to cover and the number of questions we received before and during the webinar. read more

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SBAS (WAAS) and NDGPS Accuracy and Statistics

October 21, 2010By

There's something I've been wanting to write about since the ION-GNSS conference a few weeks ago. However, a nasty cold, a 10-day trip to Europe (INTERGEO conference), and some jet lag have kept me from it until now. read more

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As Loran Fades, Attention Shifts to DGPS and SBAS

November 30, 2009By

Few precise-positioning users have employed Loran in a professional sense, although maybe you have in your personal life if you’re a airplane pilot or a mariner. Then again, if you've flown as an airline passenger or cruised onboard a ship, you've benefited from the back-up to GPS that Loran provides. That back-up is about to go away. As attention and resources shift away from Loran, they focuses more intensely on GPS augmentations, specifically differential GPS (DGPS) and satellite-based augmentation systems (SBAS) such as WAAS and EGNOS. read more

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