Wave heights forecasting are very important for a number of applications, including navigation and fishing, but also operations on platforms, etc. Those forecasts ar based on measurements.
Orders of magnitude
The higher wave height ever measured by a satellite was about 20 m. Outside extreme events, wave heights are about 3 m, 6 at the most. They are always greater or equal to zero.
- " Altimeters
- Dedicated satellites, working like altimeters but using beams with angles now exists: CFOSat
The marine weather models simulate the wave heights (they are different from the ones forecastin currents, temperature and salinity)