Were up in Prescott, Arizona and are using Spectra SP 80's
from what i understand they can mix and match satellites from any constellation, and this is why they are always locked onto and using so many satellites. They work way way WAY better in the heavy tree cover than any other system i have seen.
My question is, does any other system on the market do this? does the Spectra epoch 50 do this?
i know that other systems use multiple constellations, but they can only use one constellation at a time.
and cant for instance use glonass and US satellite at the same time.
any one have any knowledge they can share on this?
This Content Originally Published by a land surveyor to Land Surveyors United Network
what do You mean when say " ...but they can only use one constellation at a time."?
The GNSS receivers work, in RTK, using all common satellites tracked by rover and base. If You have a full GNSS system, it works with four constellations simultaneously (Navstar-GPS, Glonass, Beidou and Galileo) when the base receiver (or CORS network) is sending correction data of each sat "family" to the rover.
E.g., if You are working in N-RTK and the CORS network has only GG receivers, Your rover will use only Navstar-GPS and Glonass satellites, even if it can track Beidou and Galileo.
Regarding the performance under trees canopy, many factors can determine the RTK accuracy (DOP, multipath) and the only valid comparison is a test with different receivers in the same site and at the same day/time.