Getting the right GPS means finding a receiver that not only has the pinpoint accuracy you need but also is at a price that won't break the bank. Having a good GNSS receiver is important in getting accurate measurements and saving time with jobs. With a multitude of brands and models to choose from, it can be difficult to find the GNSS receiver that best fits your needs.
Here at SiteSurv that is a reality, the GPS' with the mix of quality combined with a great price is unrivaled. Featuring top brands such as Stonex, Geomax, and Sokkia; there are plenty of options for you to choose from to fit whatever requirements you are searching for. Our top priority here at SiteSurv goes beyond the great price points we have to offer, but the accuracy our units can obtain. GPS / GNSS Receivers have two main accuracy's. Those are cm accuracy and mm accuracy. Here at SiteSurv we strive to give you mm accuracy so you can have the best measurements out in the field of surveying.
How GPS GNSS Receivers Work
Every GPS GNSS Receivers get signals transmitted from the satellites. Each have a number of components including carrier frequencies, digital codes and a navigation message. The carriers and the codes are then used to determine the distance from the receiver to the the GNSS satellites that transmit these signals. The navigation message contains the location of the satellites as a function of time along with other information.
Why Are GPS GNSS Receivers So Precise?
GPS GNSS Receivers determine their position using four major factors which are longitude, latitude, height and clock error, and any navigation solution provided is computed based on the distance from the satellites.
GNSS receivers need at least four satellites to obtain a position. The use of more satellites improves the position solution, but not every receiver will have the ability to make use of these extra satellites. Along with the satellites, receivers also vary in terms of which constellations they track. The main reason for different GNSS constellations is availability and redundancy. If one system fails, another GNSS constellation can help take over making these such precise and powerful machines.
Besides position, GNSS Receivers can also provide users with very accurate time by synchronizing their local clock with the highly accurate atomic clocks on board the satellites it gets the signals transmitted from. This precise time allows for the smallest amounts of errors while on the job.