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gps modernization
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Truckers GPS Systems - Gps Modernization
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Truckers GPS Systems  -  gps Modernization

GPS Modernization is a multibillion-dollar program funded by the departments of Defense and Transportation to upgrade the GPS space and control components. This includes new civilian and military signals. Computer and communication systems are being replaced with what is called a network-centric arrangement. This allows more frequent and accurate satellite commands and will improve accuracy.

The first step took place in May 2000 when president Clinton directed the Department of Defense to turn of the GPS Selective Availability program (SA). SA was the deliberate global degradation of civilian GPS signal accuracy throughout the 1990’s. As a result accuracy improved ten fold. In 2007 the Government announced plans to permanently eliminate SA with plans to build the GPS III satellites without it.

President Obama’s National Space Policy of 2010, “the United States must maintain its leadership in the service, provision, and use of global navigation satellite systems (GNSS).”

Today in the news we read about GPS signal jamming, jamming devices and the threat this presents to shipping (ships are using new GPS guidance technology that will be used for commercial aircraft as it is further developed), International Financial markets (which use GPS time-keeping).

Jamming devices are radio frequency transmitters that block or jam signals for communication devices such as GPS systems, cell phone calls, text messages, and Wi-Fi networks.

These jamming devices can be purchased for under $100. And it is illegal to sell, buy or be in possession of one with fines running in the tens of thousands of dollars.

Recently we have read in the news about LightSquared’s plans to build a terrestrial satellite 4G network having the plug pulled by the FCC because of three recent reports being released finding interference caused to GPS systems on the adjacent frequency with no apparent fix in sight.

Perhaps as the GPS modernization progresses and the Air Force launces the planned satellite programs the GPS Systems will become less vulnerable to some of these problems.

When the second civil signal L2C program is completed, designed specifically for commercial applications, the signals will be combined with the L1 C/A will enable ionospheric corrections and with dual-frequency GPS receivers civilians will enjoy as good or better than the accuracy as the military.

The new GPS signals will be of limited use until they are broadcast from 18 to 24 satellites.

The GPS Modernization program should be a big boost to truckers GPS systems as well as all other civilian users. I guess new truckers GPS systems will be of the dual frequency persuasion.


Street Talk

Angie2  

I like what is happening with our GPS satellites. Good article

Reply
  about 6 years ago
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