Electromagnetic Wave Distance Measurement Over a Body of Water
Electromagnetic Wave Distance Measurement Over a Body of Water
(OP)
We often use total station instruments, which utilize electronic distance measurements (EDM), to precisely measure and monitor structures. However, I noticed when measuring and monitoring a bridge over water recently, the measured distances fluctuated significantly as compared to other measurements over dry land. I can only assume the reflections off of the water are somehow bending the waves and changing the lengths as they travel over the water. Does this hypothesis seem reasonable? Does anyone have any reference literature that can explain what is actually occurring and how? I am thinking there may be some correlation between the intensity of the reflection and the amount the waves bend.. Any input would be greatly appreciated!





RE: Electromagnetic Wave Distance Measurement Over a Body of Water
However, you need to describe the fluctuations; what were the amplitudes of the variations and what were the durations and frequencies of the variations. It's more likely, in my mind, that you are seeing actual fluctuations in the actual distance, due to wind, thermal, and even wave pressure or tidal, effects.
TTFN

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RE: Electromagnetic Wave Distance Measurement Over a Body of Water
RE: Electromagnetic Wave Distance Measurement Over a Body of Water
Could there be physical interferences (like ships or fog or boats or ice) that are fouling the path that an automated facility would not "notice"?