How GPS and Machine Control Works brought to you by:

Machine Control GPS
How GPS Works : GPS Machine Control : GPS Benefits : GPS Costs & Parts
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

GPS Base Stations Explained:
      Technically Speaking - RTK

As we have just learned on the previous page, with continuous error correcting data, the triangle of a receiver and those of the base station can be compared and the accuracy of the GPS Construction System is increased to levels that are within tolerances of the job. Technically, this radio communication process of using a base station to supply continuous correcting information is called RTK (which stands for Real-Time Kinematics, but the key words to remember are Real Time). RTK error correction provides the most precise positioning information due to the speeds. RTK base systems send error correction signals up to 20 times per second, more than twice as much information as a standard rotating laser operated machine control system receives.

If a contractor chooses to avoid the RTK method and rely on a single receiver, they must have 15 minutes or more to allow enough information to enter the receiver (20 iterations a second x 8 satellites x 15 minutes) to do the error correction on it's own.

So for reliable positions, you need a minimum of six satellites, not four. Most scientists say you really need eight to give you reliable and robust real-time positions. In addition a base station for RTK information and time saving correcting information is needed and some pretty smart software that can do all the calculations. After all, it must simultaneously track satellites, the earth’s rotation, and your movement all of which are moving in different direction! That’s fun and challenging stuff for a scientist to figure out which is why there are hundreds of engineers and PhD’s from around the world, working exclusively on this project.

Next
GPS and Machine Control © 2007     Design by:Broomfield Designers
Brought to you by Rocky Mountain Lasers & Construction Lasers World

This site is provided for informational purposes only and is copywritten information.
For information regarding products please visit our sponsors!