Survey Identifier: DSDP70GC
Format Acronym: MGD77
Data Center File Number: 15050069
Parameters Surveyed Code: 55133
File Creation Date (yyyymmdd): 19811007
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: D/V GLOMAR CHALLENGER
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): HONNEREZ J.,VON HERZEN R.P.,ETC.
Project: DEEPSEA DRILL.LG 70 <NSF>
Survey Departure Date (yyyymmdd): 19791111
Port of Departure: BALBOA,CANAL ZONE
Survey Arrival Date (yyyymmdd): 19791227
Port of Arrival: VALPARAISO,CHILE
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: +08
Bottommost Latitude: -33
Leftmost Longitude: -087
Rightmost Longitude: -072
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: 5781
Min/Max Data Record:
Date: 1979 11 11
Latitude: -32.19660
Longitude: -86.47581
Bathymetry, 2- Way Traveltime: 002300
Bathymetry, Corrected Depth: 173.0
Magnetics Total Field, 1st Sensor: 257700
Magnetics Residual Field: -07300
Min/Max Data Record:
Date: 1979 12 27
Latitude: +7.21460
Longitude: -72.13900
Bathymetry, 2- Way Traveltime: 082025
Bathymetry, Corrected Depth: 6207.0
Magnetics Total Field, 1st Sensor: 359810
Magnetics Residual Field: +06830