TAG: 24+3

On the Edge: Five Big Ones in Ten

January 1, 2011By

Look back with me at the five 2010 GNSS events that most affected surveying, mapping, engineering, construction, and natural resource users. Each one had, or could have had, a significant effect on you and your work. read more

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The Best and Final Look at the GPS 24+3 Configuration

February 17, 2010By

I didn’t plan it this way, but my coverage of GPS 24+3 turned out to be a three-part series, with this column being part three. One reason it turned into a three-part series is because I’m learning more about it along the way, but its mostly because details weren’t released all at once. read more

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GPS 24+3 Configuration: A Closer Look

February 3, 2010By

In the few years I’ve been writing this column, very few subjects have warranted back-to-back newsletter coverage. The new GPS 24+3 configuration is one of them. The reason I’ve continued with this discussion is because it will significantly affect your GPS operations, especially if you’re using RTK or DGPS. read more

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The System: New Math for GPS

February 1, 2010By

The U.S. Air Force GPS Wing and 50th Space Wing have begun repositioning GPS satellites in space to fly what they call the 24+3 or Expandable 24 constellation plan. The initiative will take up to 24 months to fully implement. Benefits to users will be slowly realized during that time, as the number of GPS satellites in view will increase, potentially increasing GPS receiver accuracy. Plus: Penny-Wise, Pound-Foolish U.S. Coast Guard to Pull Loran Plug; Galileo Satellites Awarded to OHB; Compass at Three read more

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The New GPS 24+3 Constellation: What Does it Mean to the Surveying and GIS User?

January 19, 2010By

Last week, the U.S. Air Force announced it is reconfiguring the GPS constellation. The Air Force is changing the constellation from a 21+3 configuration to a 24+3 configuration. The result will be more satellites in view, on average. This is great news for the GPS surveying and GIS mapping user. In my opinion, it was the only achievable short/medium-term solution to the GPS "brownout" problem that has plagued GPS surveying and mapping users for years, and has worsened in recent months. read more

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