C 1 U. S. GEOLOGICAL SURVEY, WESTERN MARINE AND COASTAL TEAM C 2 CRUISE ID: J294SF SAN FRANCISCO BAY AREA C 3 YEAR COLLECTED: 1994 VESSEL: R.V. DAVID JOHNSTON C 4 SAMPLE INTERVAL: 2 MSEC SAMPLES PER TRACE: 512 OR 1024 C 5 RECEIVER: 150 METER LENGTH, 24 CHANNEL, ONE HYDROPHONE PER GROUP C 6 GROUP INTERVAL: 6.25 METERS SHOT INTERVAL: 6.25 OR 12.5 METERS C 7 SOURCE: ONE OR TWO 40 CUBIC INCH AIR GUNS C 8 CDP TRACE INTERVAL: 3.125 METERS RECORD LENGTH: 1.024 2.048 SECONDS C 9 C10 IMPORTANT HEADER WORDS AND THEIR LOCATIONS: C11 NAME BYTE LENGTH DATA TYPE C12 LOCATION IN BYTES C13 FFID/SHOT 9-12 4 INTEGER C14 CDP NUMBER 21-24 4 INTEGER C15 YEAR 157-158 2 INTEGER C16 DAY 159-160 2 INTEGER C17 HOUR 161-162 2 INTEGER C18 MINUTE 163-164 2 INTEGER C19 SECOND 165-166 2 INTEGER C20 CDP-X (UTM) 181-184 4 INTEGER C21 CDP-Y (UTM) 185-188 4 INTEGER C22 UTM COORDINATES ARE EASTINGS AND NORTHINGS IN METERS IN UTM ZONE 10 C23 LATITUDE 189-192 4 FLOATING POINT C24 LONGITUDE 193-196 4 FLOATING POINT C25 LATITUDE/LONGITUDE VALUES ARE IN DECIMAL DEGREES C26 C27 THIS FILE CONTAINS 6 TO 12-FOLD STACKED MARINE SEISMIC REFLECTION DATA. C28 PRESTACK PROCESSING INCLUDED CDP SORTING, VELOCITY ANALYSIS, C29 DECONVOLUTION, BAND-PASS FILTERING (50-200 HZ), AGC, C30 NORMAL MOVE-OUT CORRECTION AND STACKING. C31 NO POST-STACK PROCESSING HAS BEEN APPLIED. C32 DATA FORMAT IS 32-BIT FLOATING POINT SEG-Y. C33 C34 FOR FURTHER INFORMATION CONTACT: C35 RAY SLITER OR PATRICK HART C36 U.S. GEOLOGICAL SURVEY, MS-999 C37 345 MIDDLEFIELD RD. MENLO PARK, CA 94025 C38 (415) 853-8300 C39 INTERNET: RSLITER@USGS.GOV OR HART@USGS.GOV C40 ************************************************************************** ******************************************************************************************* *GIN* CLOSING REEL:DISK ON UNIT:DISK * * FIRST ENSEMBLE.SEQNO: 1. 1 LAST ENSEMBLE.SEQNO: 2096. 1 * ******************************************************************************************* 1 minke (CPU) JOB 398 G199GM GM6 7-OCT-1999 11:58:55.00 4.2 MODULE SUMMARY MODULE TRACES BNDL TRACE User CPU System CPU Total CPU NAME OUTPUT SIZE LENGTH Time Time Time (SAMPLES) (secs) (secs) (secs) 1 JOB 2 GIN 2096 1250 1.03 0.16 1.19 3 END 1250 0.01 0.01 0.02 KEY - TRACE IN AP + TRACE IN AP (MAPPED) * AP BUNDLING ( SINGLE TRACE MODE) # AP BUNDLING ( MULTI TRACE MODE) 1 minke (CPU) JOB 398 G199GM GM6 7-OCT-1999 11:58:55.00 JOB TIME SUMMARY JOB START TIME 7-OCT-1999 11:58:55.00 JOB END TIME 7-OCT-1999 11:58:57.00 NORMAL COMPLETION