C 1 U. S.  GEOLOGICAL SURVEY                     COASTAL AND MARINE GEOLOGY TEAM
C 2 SURVEY_ID:  S7-08-SC                         YEAR:  2008                    
C 3 AREA:   SANTA BARBARA                        VESSEL: R/V PARKE SNAVELY      
C 4 HIGH-RESOLUTION CHIRP   REFLECTION DATA                                     
C 5 SYSTEM:    EDGETECH 512 SUBBOTTOM PROFILER                                  
C 6            500 - 7200 HZ CHIRP  30 MS SWEEP                                 
C 7            DELPH SEISMIC DIGITAL RECORDING SYSTEM                           
C 8            DIFFERENTIAL GPS NAVIGATION /(10 METER LAYBACK APPLIED)           
C 9            INSTRUMENT DEPTH CORRECTION APPLIED                              
C10                                                                             
C11            REC LENGTH 300 MS, SHOT RATE 500 MS                              
C12                                                                             
C13            ACQUISITION SPEED 4.5 TO 5.5 KTS.                                
C14                                                                             
C15                                                                             
C16                                                                             
C17                                                                             
C18                                                                             
C19                                                                             
C20                                                                             
C21                                                                             
C22  DATA OUTPUT:                                                               
C23           32-BIT FLOATING POINT SEG-Y OUTPUT FILE, 12.5 KHZ SAMPLING        
C24           OUTPUT FILE CONTAINS SINGLE AMPLITUDE ENVELOPE CHANNEL PER PING   
C25                                                                             
C26           SEG-Y TRACE HEADER LOCATIONS:                                     
C27           FFID       9-12      INTEGER      SEQUENTIAL PING OR SHOT NUMBER  
C28    INSTRUMENT DEPTH  49-52     INTEGER      DECIMETERS                      
C29           LONGITUDE  73-76     INTEGER      MILLISECONDS OF ARC             
C30           LATITUDE   77-80     INTEGER      MILLISECONDS OF ARC             
C31           DAY        159-160   INTEGER      JULIAN DAY                      
C32           HOUR       161-162   INTEGER      HOUR /(24-HOUR CLOCK)            
C33           MINUTE     163-164   INTEGER      MINUTE                          
C34           SECOND     165-166   INTEGER      SECOND                          
C35                                                                             
C36   FOR FURTHER INFORMATION CONCERNING THIS DATASET, CONTACT:                 
C37           PATRICK HART    /(650) 329-5160    HART@USGS.GOV                   
C38           RAY SLITER      /(650) 329-5194    RSLITER@USGS.GOV                
C39           U. S. GEOLOGICAL SURVEY, M/S 999                                  
C40           345 MIDDLEFIELD RD., MENLO PARK, CALIFORNIA  94025