link to main US Geological Survey website
US Geological Survey
Open-File Report 02-368

 

SEG-Y EBCDIC Header for 1998 Cruise

C 1 U. S. GEOLOGICAL SURVEY COASTAL AND MARINE GEOLOGY TEAM
C 2 SURVEY_ID: G1-99-GM YEAR: 1999
C 3 AREA: NORTHERN GULF OF MEXICO VESSEL: R/V GYRE
C 4  
C 5 ACQUISITION:15 CUBIC INCH WATER GUN ; APPROX 10 METER SHOT INTERVAL
C 6 24 CHANNEL 240-METER SOLID CORE HYDROPHONE STREAMER
C 7 0.25 MS RECORDING SAMPLE INTERVAL, 2.5 SEC RECORD LENGTH
C 8  
C 9 PROCESSING: RESAMPLE TO 0.5 MS, SOURCE SIGNATURE DECONVOLUTION,
C10 TRUE AMPLITUDE RECOVERY, VELOCITY ANALYSIS,
C11 DEEP-WATER-DELAY STATIC CORRECTION,
C12 12-FOLD STACK, DATA GAPS FILLED WITH BLANK TRACES.
C13  
C14 OUTPUT: 32-BIT IBM FLOATING POINT SEG-Y
C15 DATA LENGTH 2.5 SEC
C16 OUTPUT: 32-BIT IBM FLOATING POINT SEG-Y
C17 DATA LENGTH 2.0 SEC
C18 RECORD LENGTH 3.0 TO 3.5 SEC TO INCLUDE DEEP-WATER DELAY
C19  
C20  
C21 HEADERS: FFID NUMBER STORED IN BYTES 9-12
C22 CDP STORED AS 4-BYTE INTEGER IN BYTES 21-24
C23 NO LOCATION DATA IN TRACE HEADERS
C24 SEQUENTIAL SHOT NUMBER STORED IN BYTES 181-185
C25 SHOT JULIAN DAY/HOUR/MINUTE IN BYTES 185-189
C26  
C27  
C28  
C29  
C30  
C31  
C32  
C33  
C34  
C35  
C36 FOR FURTHER INFORMATION CONCERNING THIS DATASET, CONTACT:
C37 ALAN COOPER (650) 329-5157 ACOOPER@USGS.GOV
C38 PATRICK HART (650) 329-5160 HART@USGS.GOV
C39 U. S. GEOLOGICAL SURVEY, M/S 999
C40 345 MIDDLEFIELD RD., MENLO PARK, CALIFORNIA 94025

 


URL of this page: https://pubs.usgs.gov/of/2002/of02-368/ebcdic99.html
Maintained by: Michael Diggles
Created: 9-12-02 (cad)
Last modified: 6/30/08 (mfd)