Looking to increase accuracy of a microwave transceiver pair designed to measure very long distances (*up to even 100km, Line of sight) They send a microwave carrier, modulated by HF radio modulation sine waves. To an identical Transceiver at the far end. Which sends the modulated carrier back. and phase comparisons of emitted and returned sigs are compared and precisely quantified. Most instrument specs from the old days are still pretty good, +- a centimeter or so, and a ppm variation with total distance. --In 40-60km High accuracy stuff needs good meteorology data along the line measured, which affects c = speed of radio waves at the time of measurement. The Modulation frequencies need to be either monitored continuously and/or need to be stable to assigned values. Trying to modify internal frequency reference of a pretty old system to GPSDO accuracy. Anyone here that has done EDM work in surveying or Geodesy, etc? Best, 73, Pat Barthelow AA6EG apol <[email protected]>[email protected]
*"The most exciting phrase to hear in Science, the one that heraldsnew discoveries, is not "Eureka, I have found it!" but:* "That's funny..." ----Isaac Asimov _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
