GPS was invented in 1955 by one of the top proponents of ether theory of all time: Dr. Friedwardt Winterberg.
http://zfn.mpdl.mpg.de/data/Reihe_A/44/ZNA-1989-44a-1145.pdfSubstratum Interpretation of the Sagnac and the Aharonov-Bohm effect
Dr. Friedwardt Winterberg
Ph.D., Physics 1955 Max Planck Institute, Goettingen, Germany (Adv: Prof. W. Heisenberg)
1968-Present Professor of physics, University of Nevada Reno
1955-1959 Group leader theoretical physics division at nuclear research reactor in Hamburg, Germany, under President Eisenhower's "Atoms for Peace" program
Elected member International Academy of Astronautics, Paris, France.
Member of American Physical Society.
Recipient of the 1979 Hermann Oberth Gold Medal (the highest award in astronautical research given for his work on nuclear rocket propulsion).
More than 260 single author papers in refereed journals, two books, with many citations, including citations by the NY Times, Scientific American, Physics Today et al., 55 publications since 1992.
Maxwell’s Aether, The Planck Aether Hypothesis and Sommerfeld’s Finestructure Constant
http://www.space-lab.ru/files/pages/PIRT_VII-XII/pages/text/PIRT_VIII/Winterberg_1.pdfThe Planck Aether Hypothesis
http://bourabai.kz/winter/planck-e.htm