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How GPS and Machine Control Works brought to you by:

Machine Control GPS
GPS Machine Control Home

GPS Info:
What is GPS
How GPS Works
GPS Systems Accuracy
- US GPS
- Soviet GLONASS
- EU Galileo
- Why GPS, GLONASS & Galileo

Machine Control GPS:
How GPS Machine Control Works
- Base Stations intro
- Radio Base Stations
- GPS and RTK accuracy
- GPS + Laser = MM Accuracy
- GPS + Cell = 1200+ Sq Miles
- GPS on Machines
- GPS Control Boxes/Computers
- GPS Automate Vs. Indicate

GPS System Benefits:
GPS Machine Control Benefits
- Billing Controls
- Data and Management
- Job Management
- Move Dirt 1 Time!
- Many Machines

GPS Parts, Prices, and More:
GPS Machine Control Parts & Cost
- Pricing Automate vs Indicate
- GPS for Graders
- GPS for Dozers
- GPS for Blades
- GPS for Scrapers
- GPS for Excavators

Informative Grade Sites:
AccurateGrade.com
- Precision Grading Practices


LowCostMachineControl.com
- Laser Machine Systems


Sponsors:
Rocky Mtn Lasers
Construction Lasers


Construction Directory

U.S. GPS Constellation

GPS, or the American Constellation of Global Positioning Satellites owned by the U.S. military, orbits approximately 11,000 miles above the earth at a defined azimuth and elevation. Even though the primary purpose for the American global satellite systems was military guidance, the system’s benefit for everyday purposes soon became obvious, and was released to the public*. However, the United States Military has the ability to modify these flight paths for their operations and has been known to take a satellite or two to support ongoing military operations in theaters around the world.

Each GPS satellite sends out a radio signal at a known wavelength and time so precise (from an atomic clock) that the distance to each satellite can be measured to less than 1/16 of an inch! To do so, each Satellite produces a number of codes that look like this.....

Long story short, the public has access to only one of these two, the L1 code. The L2 code broadcasts error correction so that one receiver can triangulate much more accurately. We therefore receives coordinates less accurate than the military*. We receive half the information necessary to do the mathematical calculations.



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* GPS Satellites do not have their error frequency decoded. This is for national security purposes and keeps single handheld GPS receivers from being accurate within a foot.
GPS and Machine Control © 2007     Design by:Broomfield Designers
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