[Comment on “The impact of VLBI and GPS on geodesy”] Global positioning technology



In an otherwise excellent article (“The Impact of VLBI and GPS on Geodesy,” Eos, September 27, 1983, p. 569), Dr. John D. Bossler inaccurately reports that the Macrometer, a single channel receiver which came to market only last year and is restricted to relative position use was the first global positioning system (GPS) receiver to become commercially available.

As many in the geophysics community know, Stanford Telecommunications, Inc. (STI), has provided GPS receivers and transmitters commercially for almost 5 years.