3-Mile Slough Installation
May 3, 1996
Phase and Envelope Times and Signal Strength


In the figure below the upper curve shows the envelope time (points with large scatter) and the phase time. The slow general decrease is due to tides, while several trains of waves due to passing boats can be seen. The lower curve shows the rms signal strength. When the boats go by, the signal strength is seen to decrease.

The times plotted are delays in microseconds, relative to a signal replica stored on disk. The envelope time (points with large scatter) has been used to adjust the phase time by a multiple of the period of the carrier, for best agreement between the two times.