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
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GLONASS AND GPS
Why is this GLONASS / GPS integration such a huge advantage?
In the mid 1990’s the first dual constellation receiver boars appeared on the market that integrated single-frequency GPS plus GLONASS signals. Now we explained that in order to generate coordinates one must be viewing 4 satellites, but to truly generate "Good Coordinates" you would like to see 6 satellites. Finally to have the "best" accuracy you need to receive signals from a minimum of eight satellites. Well, there are times during the day when it is impossible to get eight GPS satellites in view, even on a flat job site! Now, add in some trees, a few buildings—you could be lucky to receive 4 or 5 GPS satellites. What does that do to your accuracy, if you’re able to keep working at all? Ultimately, when you invest in a positioning solution, whether for a surveying crew or for stake less 3-D grading, you want “uptime” not “downtime,” and that uptime must be accurate.
Therefore, the one overwhelming advantage to GPS and GLONASS integral systems is this — the integration provides access to 33 percent more satellites than ordinary GPS. That’s because GPS with GLONASS has the ability to track not only both frequencies of all 24 GPS satellites, it can also receive the signals from the 9 GLONASS positioning satellites (with another 6 GLONASS satellites scheduled for launch this year). The accessibility to more satellites directly relates to the precision obtained. A satellite availability comparison shows that at all times the Dilution of Precisions are lower numbers when GLONASS satellite information is included with GPS satellite positioning information, in comparison to GPS satellite positioning information alone.
For surveyors working in high latitudes, adding GLONASS to GPS can also add strength to positioning. With the inclination of GPS orbits being 55°, all satellites are south of the observer’s zenith in the second and third quadrants. In Fairbanks, Alaska, for example, the only satellites to the north are on the other side of the North Pole and just barely above the horizon. With the inclination of GLONASS orbits almost 10° higher, observers in Fairbanks will have observable GLONASS satellites in all four quadrants.
That is what global positioning is all about–accuracy, all the time. So if the highest degree of accuracy and productivity is important to you, you need a system that receives both GPS plus GLONASS positioning systems information.
If and when Galileo Systems come online from the European Union even more satellite signals will be available. If and when this happens there is a completely new set of signals that will be provided by those satellites. Many of the manufacturers of GPS systems on the market have already developed, tested, and are delivering chips that have these capabilities on board. Ask your dealer; you might already have the Galileo chipset in your machine.
How Machine Control Works
GPS System Benefits
GPS Parts, Prices, and More
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