SECURITY CLASSIFICATION OF THIS PACE (Whmn Dmim EntmrBd) 



REPORT DOCUMENTATION PAGE 



I. REPORT NUMBER 



TR-279 



2. GOVT ACCESSION NO. 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



3. RECIPIENT'S CATALOG NUMBER 



TR 279 



4. TITLE Cand Sub«((«; 



Description, Analysis, and Prediction of 

 Sea Floor Roughness Using Spectral Models 



S. TYPE OF REPORT « PERIOD COVERED 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORC*; 



Christopher G. Fox 



S. CONTRACT OR GRANT NUMBERftJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Advanced Technology Staff 



Naval Oceanographic Office 



NSTL. MS 39522-5001 



II. CONTROLLING OFFICE NAME AND ADDRESS 



Naval Oceanographic Office 

 Bay St. Louis 

 NSTL, MS 39522-5001 



12. REPORT DATE 



13. NUMBER OF PAGES 



U. MONITORING AGENCY NAME A AOORESSC// dlltatmt ham Conlrolllng Otllcm) 



IS. SECURITY CLASS, (ot thim report) 



Unclassified 



le. DISTRIBUTION STATEMENT (ot tMa Raport) 



Approved for public release; distribution unlimited 



17. DISTRIBUTION STATEMENT (ol Ml* mbmtrmcl •nimrod In Block 30, II diflmrtnt Irom Rtport) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Contli\um on r«v«r«« aldo II noefary and Idantlly by block nuaibar) 



Roughness, frequency spectrum, marine geology and geophysics, acoustic 

 bottom interaction, multi-beam sonar, bathymetry, numerical modelling. 



20. ABSTRACT (Conllnua on tavaraa alda II nacataary and Idantlly by block numbar) 



A method has been developed which allows a valid statistical model of 

 the variability of oceanic depths to be derived from existing digital 

 bathymetric soundings. The bathymetry of the world ocean has been 

 mapped using a variety of acoustic sounding instruments and traditional 

 contouring methods. The bathymetric contours represent a low-frequency, 

 deterministic model of the seafloor. To describe the higher frequency 

 (continue on reverse) 



irn DO tjAN*73 1473 EDITION OF 1 NOV 65 IS OBSOLETE 



:° S/N 0102- LF- 014- 6601 



SECURITY CLASSIFICATION OF THIS PAGE flWi^n Data Mnlarad) 



