C 1 U.S. GEOLOGICAL SURVEY, PACIFIC COASTAL AND MARINE SCIENCE CENTER C 2 LINE: OMBC-08 SURVEY_ID: S-04-12-MB YEAR: 2012 C 3 FFID RANGE: 1 - 1865 C 4 AREA: OUTER MONTEREY BAY, CALIFORNIA VESSEL: R/V PARKE SNAVELY C 5 HIGH-RESOLUTION CHIRP REFLECTION DATA C 6 SYSTEM: EDGETECH 512 SUBBOTTOM PROFILER C 7 500HZ - 7.2HKZ CHIRP 30 MS SWEEP C 8 DELPH SEISMIC DIGITAL RECORDING SYSTEM C 9 DIFFERENTIAL GPS NAVIGATION (NO LAYBACK APPLIED) C10 C11 C12 REC LENGTH 190 MS, FIRE RATE 250 MS C13 C14 ACQUISITION SPEED 4.5 TO 5.0 KTS. C15 C16 OUTPUT FILE CONTAINS SINGLE AMPLITUDE ENVELOPE CHANNEL PER PING C17 NO FISH DEPTH VALUE (SENSOR NOT WORKING) C18 C19 C20 C21 C22 DATA OUTPUT: C23 32-BIT FLOATING POINT SEG-Y OUTPUT FILE, 8 KHZ SAMPLING C24 (RESAMPLED FROM 46 MICROSECONDS TO 125 MICROSECONDS) 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 SAM JOHNSON (831) 460-7546 SJOHNSONE@USGS.GOV C38 RAY SLITER (831) 460-7427 RSLITER@USGS.GOV C39 PACIFIC COASTAL AND MARINE SCIENCE CENTER C40 400 NATURAL BRIDGES DRIVE SANTA CRUZ CALIFORNIA 95060