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ONEWAY TRANSMISSION OF TIME SIGNALS
VARIATIONS IN PROPAGATION DELAY OF HF SIGNALS
Great Circle Distance Calculations
59th pulse accuracy Actual Propagation Delay agation delay atomic Average c/s tone Calculated Propagation Delay chart CIRCLE DISTANCE CALCULATIONS circle path length cot c/2 cycles of 1000 determine distance of one-hop Ephemeris F-2 layer mode given path ground wave propagation HF SIGNALS HF TIMING SIGNALS high precision Interruption from minute ionospheric layer height ionospheric reflection June 20 master clock Maui Maximum Usable Frequencies mean solar day method of synchronizing micro microseconds millisecond minute 29 mode of propagation n-hop path number of hops one-hop mode Path WWV PLOT OF TABLE reflecting layer second By steps Second-to-Second Measurement signal-to-noise ratio signals from WWV Sky Wave Propagation slave clock SYNCHRONIZATION OF WIDELY synchronizing widely separated transponder TWO-WAY TRANSMISSION U.S. Naval Observatory variations versus virtual height wave propagation delay wave signals wave timing signals widely separated clocks WWV and WWVH WWV to Boulder WWV to WWVH WWVH 27