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READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



NOSC Technical Report 550 (TR 550) 



2. GOVT ACCESSION NO. 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



EXPENDABLE BATHYTHERMOGRAPH (XBT) 

 ACCURACY STUDIES 



5. TYPE OF REPORT & PERIOD COVERED 



Final Report 



May 1971-December 1979 



6. PERFORMING ORG. REPORT NUMBER 



7. AuTHORfs; 



Dr. E. R. Anderson 



8. CONTRACT OR GRANT NUMBERfsJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Naval Ocean Systems Center 

 San Diego, CA 92152 



SF 52-552-602, SUIO 



II. CONTROLLING OFFICE NAME AND ADDRESS 



Naval Sea Systems Command (Code 06H1 - 4) 

 Washington, DC 20350 



12. REPORT DATE 



15 June 1980 



13. NUMBER OF PAGES 

 202 



U. MONITORING AGENCY NAME ft ADDRESSfi/ d/«erem Irom Controlling Olllce) 



IS. SECURITY CLASS, (ot thia report) 



UNCLASSIFIED 



15«. DECLASSIFICATION/ DOWN GRADING 

 SCHEDULE 



16. DISTRIBUTION STATEMENT (of this Report) 



Approved for public release ; distribution unlimited 



17. DISTRIBUTION STATEMENT (ol the abatract entered In Block 30, II dlllereni Irom Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue . 



Bide II neceaaary and Identify by block number) 



Expendable bathythermography (XBT) 



Malfunctions and remedies 



Ocean temperature 



Undersea acoustics 



Predictions 



20. ABSTRACT (Continue on reverae aide II neceaaary and Identity by block number) 



This report is an examination of the accuracy of expendable bathythermograph (XBT) system temperature 

 profiles. It covers a suite of studies on 1961 460-m and 26 1830-m XBT profiles collected between 1971 and 1975. 

 The samples show that many visually acceptable but actually erroneous measurements are being transmitted to the 

 Fleet Numerical Weather Center (FNWC), which results in inaccuracies of acoustic predictions based on these 

 measurements. 



DD ,: 



FORM 

 AN 73 



1473 



EDITION OF 1 NOV 65 IS OBSOLETE 



S/N 0102-LF-014-6601 



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