Survey Identifier: DSDP55GC
Format Acronym: MGD77
Data Center File Number: 15050054
Parameters Surveyed Code: 55133
File Creation Date (yyyymmdd): 19791129
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: D/V GLOMAR CHALLENGER
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): KOIZUMI I.,JACKSON D.
Project: DEEPSEA DRILL.LG 55 <NSF>
Survey Departure Date (yyyymmdd): 19770713
Port of Departure: LOS ANGELES,CALIFORNIA
Survey Arrival Date (yyyymmdd): 19770905
Port of Arrival: YOKOHAMA,JAPAN
Navigation Instrumentation: SATNAV,MANUAL ENTRY GYRO AND SPD CHANGES
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: 3.5-12KHZ/EDO 550A RECORDERS/WIDE BEAM
Additional Forms of Bathymetric Data: ANAL.RECORDS,CARDS,35MMFILM
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD G-801/3
Additional Forms of Magnetics Data: ANAL.RECORDS,CARDS,35MMFILM
Gravity Instrumentation: NONE COLLECTED
Seismic Instrumentation: 20TO300CU.IN.AIRGUN,10-300HZ,EDO 550 REC
Formats of Seismic Data: ANAL.RECORDS,35MM MICROFILM
Topmost Latitude of Survey: +52
Bottommost Latitude: +21
Leftmost Longitude: +140
Rightmost Longitude: -119
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1SECONDSWEEP
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: 5 MINUTE INTERVAL
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 06
Reference Field Code: 04
Reference Field: IGRF 1975
Method of Applying Residual Field: LIN. INTERP.POINTS WITHIN ONE DEGREE SQUARE
Number of Data Records: 9952
Min/Max Data Record:
Date: 1977 07 14
Latitude: +21.25330
Longitude: -179.99260
Bathymetry, 2- Way Traveltime: 002450
Bathymetry, Corrected Depth: 184.0
Magnetics Total Field, 1st Sensor: 355070
Magnetics Residual Field: -08950
Min/Max Data Record:
Date: 1977 09 05
Latitude: +51.62960
Longitude: +179.99810
Bathymetry, 2- Way Traveltime: 103175
Bathymetry, Corrected Depth: 7875.0
Magnetics Total Field, 1st Sensor: 490650
Magnetics Residual Field: +10840