04170776 is referenced by 66 patents.

A system for use in detecting earth crustal deformation using an RF interferometer technique for such purposes as earthquake predictive research and eventual operational predictions. A lunar based RF transmission or transmissions from earth orbiting satellites are received at two locations on Earth, and a precise time dependent phase measurement is made of the RF signal as received at the two locations to determine two or three spatial parameters of the antenna relative positions. The received data are precisely time tagged and land-line routed to a central station for real-time phase comparison and analysis. By monitoring the antenna relative positions over an extended period of months or years, crustal deformation of the earth can be detected.

Title
System for near real-time crustal deformation monitoring
Application Number
5/863024
Publication Number
4170776
Application Date
December 21, 1977
Publication Date
October 9, 1979
Inventor
Peter F MacDoran
Altadena
CA, US
Robert A Administrator of the National Aeronautics and Space Administration with respect to an invention of Frosch
Altadena
CA, US
Agent
Paul F McCaul
John R Manning
Monte F Mott
IPC
H04B 7/00
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