Survey Identifier: 78123005
Format Acronym: MGD77
Data Center File Number: 08010054
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19
Source Institution: HAWAII INSTITUTE OF GEOPHYSICS
Country: U.S.A.
Platform Name: R/V KANA KEOKI
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): J. FRISBEE CAMPBELL
Project: GALAPAGOS, LEG II, KK78123005
Funding: NSF
Survey Departure Date (yyyymmdd): 19790501
Port of Departure: SANTA CRUZ, GALAPAGOS
Survey Arrival Date (yyyymmdd): 19790514
Port of Arrival: ACAPULCO, MEXICO
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: SATELLITE
Bathymetry Instrumentation: 3.5 KHZ,30-DEGREE BEAM,1-SEC.SWEEP
Additional Forms of Bathymetric Data: ANALOG,MICROFILM
Magnetics Instrumentation: PROTON PRECESSION MAG-GEOMETRICS
Additional Forms of Magnetics Data: ANALOG,MICROFILM
Gravity Instrumentation: LACOSTE-ROMBERG S-42 (OSU METER)
Additional Forms of Gravity Data: ANALOG,MICROFILM
Seismic Instrumentation: (SEE ADD.DOC. 18)
Formats of Seismic Data: ANALOG,MICROFILM
Topmost Latitude of Survey: +17
Bottommost Latitude: -01
Leftmost Longitude: -100
Rightmost Longitude: -090
General Digitizing Rate of Bathymetry: 39
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: NO INTERPOLATION
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Magnetic Sensor Tow Distance: 0213
Sensor Depth: 00000
Horizontal Sensor Separation: 000
Reference Field Code: 04
Reference Field: IGRF 1975
Method of Applying Residual Field: CALCULATED FOR EACH DATA VALUE
General Digitizing Rate of Gravity: 050
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAGSYSTEM1967
Reference System Code: 3
Reference System: IGSN71
Corrections Applied: DRIFT,+0.0111 MGAL PER DAY
Departure Base Station Gravity: 9785104
Departure Base Station Description: ACAPULCO, MEXICO
Arrival Base Station Gravity: 0000000
Additional Documentation: 09 40-300HZ., MIXED:10-40/100-300HZ.,5-SEC.REP.RATE,40-CU.IN.AIRGUN, 09 3600J SPARKER, OBS#169-172. 15 GRAVITY BASE STATIONS IN GEORGE P. WOOLLARD AND JOHN C. ROSE, 15 INTERNATIONAL GRAVITY MEASUREMENTS, MADISON, UNIV OF WISCONSIN, 1963, 15 STILL METER READING 6298.5
Number of Data Records: 17934
Min/Max Data Record:
Date: 1979 05 01
Latitude: -0.81351
Longitude: -99.90918
Bathymetry, 2- Way Traveltime: 000240
Bathymetry, Corrected Depth: 18.0
Magnetics Total Field, 1st Sensor: 308640
Magnetics Residual Field: -13830
Free-Air Anomaly: -1464
Min/Max Data Record:
Date: 1979 05 14
Latitude: +16.84790
Longitude: -90.25753
Bathymetry, 2- Way Traveltime: 072310
Bathymetry, Corrected Depth: 5455.0
Magnetics Total Field, 1st Sensor: 412660
Magnetics Residual Field: +07330
Free-Air Anomaly: +0663