Lies that flerfs tell - Episode 3: Sea Level is flat
Автор: PhD Tony
Загружено: 2023-06-24
Просмотров: 4114
Описание:
In this video I consider the flat earth claim that sea level is flat.
I provide the definition of the geoid, the equipotential surface that coincides with mean sea surface height (SSH). This surface can be mapped from precise measurements of gravity using ground-based, airborne, ship-borne and satellite-based gravimetric measurements. This surface broadly agrees with the reference ellipsoid but deviates by as much as 100 metres in some instances. Demonstrating that sea level is not flat.
This result is confirmed by observations of mean SSH from satellite altimetry. The altimetry results are in turn confirmed to be accurate through comparison with tide gauge and GNSS data.
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