Linear and nonlinear mapping of sea surface waves imaged by synthetic aperture radar
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Communication Engineering (MPCOM), MSc
Publicerad
2025
Författare
Qefalija, Eltjon
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Ocean observation is a powerful tool for ocean monitoring of sea surfaces. With
the help of SAR it becomes easier to monitor large wave fields. The purpose of
this project is to provide a simulator which when given the wind speed and wind
direction, to generate the ocean wave field equivalent to those parameters, to simu late the SAR image, and finally to provide the transform for the linear, quasilinear,
and nonlinear mapping. In the simulation, an analysis is performed on the validity
of the three transforms, where different wind speeds, wind directions, and Slant
Range-Velocity ratios β are used. The results, show that the linear and quasilinear
transforms can be used when the value is β is low. On the other hand, the non linear transform can always be used, in many different scenarios. Remaining work
to be done is an inversion algorithm to extract the ocean parameters from the SAR
spectrum, an analysis of the effect of the ocean currents and finally the analysis of
nonlinear waves.
Beskrivning
Ämne/nyckelord
RAR, SAR, Oceanography, Simulation, Wind, radar, ocean, waves