definition for: #4thWaveGNSS

Indicates an era of high precision GNSS field instrument development where the imitators have now become innovators. Distinct from the 1st wave where user instruments were for purely defense (as the U.S. global satellite system GPS was a military program), and the 2nd that saw the first commercially and publicly available user instruments, to the 3rd that saw many 3rd party developers using OEM components from the 2nd wave developers, to the 3rd: a global boom in new developers and manufacturers.