TABLE OF CONTENTS 



Page 



FOREWORD HI 



ACKNOWLEDGEMENTS v 



FIGURES ......... o ......... o ...... o . » vlll 



TABLES Ix 



INTRODUCTION. ......... ............... . 1 



GENERAL THEORY AND BACKGROUND 1 



INSTRUMENTS . 4 



Sea Surface Profiler 4 



Aircraft Motions 8 



Navigation 13 



THE WEATHER SITUATION 13 



The General Weather Picture 13 



A Closer Look At the Windfield 15 



TREATMENT OF THE DATA 18 



Spectral Analysis 18 



Numerical Filtering 20 



Statistical Tests , 22 



THE SPECTRAL TRANSFORMATION. 23 



The Frequency Transformation 23 



Specification of the Integral Transformation 24 



Solution of the Integral Equations 26 



Definition of the Spectral Field 32 



