we yee 7 Laer eo SECURITY CLASSIFICA”. Se OF THIS PAGE (When Data Entered) YO b PAGE ‘ REPORT BOCUKENTATION REP 4. REF CRT NUKEER READ INSTRUCTIONS BER INSTRUCTIONS , 2. GOVT ACCESSION NOW WT-920 (EX) 4. TITLE (ard Subtitte) AU THOR(s) R. B. Vaile 9. RECIPIENT'S CATALOG KUMBER S. TYPE OF REPORT & PERIOD COVERED Operation Castle, Project 3.2, Crater Survey ?. 3. PERFORMINGORGANIZATION NAME AND ADDRESS 6. PERFORNING ORG. REPORT NUMBER @®. CONTRACT OR GRANT NUMCER(s) WT-920 (EX) 10. Stanford Reséarch Institute Stanford, California PROGRAM ELEMENT, PROJECT, TASK AREA & HORK UNIT NUMBERS sf 11. CONTROLLING OFFICE Raw ANO ADORESS '2. REPORT DATE Headquarters FieldCommand June 1955 Armed Forces Special. Weapons Project 13. NUMBER OF PAGES Sandia Base, Albuquerque, New Mexico $4. MONITORING AGENCY NAME & ADORESS(il different from Controtling Office) 18. SECURITY CLASS. (of thie report) UNCLASSIFIED Se. 16. OECL BSSIFICATION/ DOWNGRADING SCHEOULE OFSTRIBUTION STATEMENT (of this Repoi Approved for public release; unt inted distribution. & tee OISTRIBSUTION STATEMENT (of the abstract entered in meer if dilfecent lrom Report) Renee 1S. so eeatmteas a entnachte 17. SUPPLEMENTARY NOTES This report has had the classified information rambved and has been republished in unclassified form for public release. This wark'was performed by Kaman Tempo under contract DNAQO1-79-C-0455 with the close cdaperation of the Classification Management Division of the Defense Nuclear Agency. 19. KEY WORDS (Continue on reverse side if necessary and identify by biock number! Cratering Nuclear Weapons r : if Surface Effects og Spa fathometer measurements of CASTLE Shots 1, 3, and 4 were made to assistin the prediction of craters produced by megaton weapons. The Shot 1 crater could have been predicted satisfactorily from the IVY Mike Shot. Shot 3 crater was smaller than predicted on that basis. Both craters were larger than predictions based on simple scaling of the JANGLE surface shot, even if some allowance is made for the difference in soils. DD 120", 1473 cvition oF 1 Nov 681s o@soLETE UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 4