------------------------------------------------------------------------------- EBCDIC ASCII Header ------------------------------------------------------------------------------- C 1 U. S. GEOLOGICAL SURVEY COASTAL AND MARINE GEOLOGY TEAM C 2 LINE: PBS-27 SURVEY_ID: S6-08-SC YEAR: 2008 C 3 AREA: POINT BUCHON, CALIFORNIA VESSEL: R/V PARKE SNAVELEY C 4 HIGH-RESOLUTION SPARKER REFLECTION DATA C 5 SYSTEM: SIG ELC50 SPARKER SYSTEM @500 JOULES C 6 APPROX 200 - 2000 HZ MINI SPARKER 500 - 1500MS SWEEP C 7 TRITON SUBBOTTOM LOGGER SYSTEM C 8 DIFFERENTIAL GPS NAVIGATION WITH 52M LAYBACK APPLIED C 9 C10 C11 C12 C13 ACQUISITION SPEED 4.5 TO 5.0 KTS. C14 C15 C16 C17 C18 C19 C20 C21 C22 DATA OUTPUT: C23 32-BIT FLOATING POINT SEG-Y OUTPUT FILE, 16 KHZ SAMPLING C24 C25 C26 SEG-Y TRACE HEADER LOCATIONS: C27 FFID 9-12 INTEGER SEQUENTIAL PING OR SHOT NUMBER C28 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