reply to marigolds
Re: GNSS is not the solution GNSS is an acronym for Global Navigation Satellite Systems. It simply means multiple systems, like GPS, Glonass, Galileo and Compass. Javad is a company, named after it's owner Javad Ashjaee, that makes high precession GPS equipment that works with these satellite systems. Leica, Trimble, Topcon, Ashtech, etc., etc., etc. all offer multi constellation receivers now. The more satellites you can track, the better. GPS and Glonass are the only currently fully functional satellite navigation systems. And GPS accuracy is better than Glonass.
No land surveyor who has spent in excess of $15,000 per high accuracy receiver is going to want to pay anything extra nor want to do anything to degrade the accuracy of their equipment. No farmer or construction contractor who uses high accuracy GPS for machine control wants too either. I doubt the military or the airlines want to equip their planes and other equipment. This issue is far from over.