Survey Identifier: 78123004
Format Acronym: MGD77
Data Center File Number: 08010053
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): RICHARD HEY
Project: GALAPAGOS, LEG I, KK78123004
Funding: ONR/NSF
Survey Departure Date (yyyymmdd): 19790331
Port of Departure: ACAPULCO, MEXICO
Survey Arrival Date (yyyymmdd): 19790429
Port of Arrival: SANTA CRUZ, GALAPAGOS
Navigation Instrumentation: SATELLITE, OMEGA
Geodetic Datum/Position: PRIM-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,DIGITAL
Topmost Latitude of Survey: +17
Bottommost Latitude: -02
Leftmost Longitude: -100
Rightmost Longitude: -089
General Digitizing Rate of Bathymetry: 32
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 40-250HZ.,ALP,EPC;MIXED 40-100/40-250HZ.,5-SEC.REP.RATE,XBT:7-9, 09 40-CU.IN.AIRGUN,4500J SPARKER,OBS#158-168. DIGITAL REFRACTION DATA. 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: 45379
Min/Max Data Record:
Date: 1979 03 31
Latitude: -1.13260
Longitude: -99.90282
Bathymetry, 2- Way Traveltime: 000010
Bathymetry, Corrected Depth: 1.0
Magnetics Total Field, 1st Sensor: 300980
Magnetics Residual Field: -23040
Free-Air Anomaly: -1337
Min/Max Data Record:
Date: 1979 04 29
Latitude: +16.84791
Longitude: -89.60388
Bathymetry, 2- Way Traveltime: 071520
Bathymetry, Corrected Depth: 5394.0
Magnetics Total Field, 1st Sensor: 414740
Magnetics Residual Field: +11680
Free-Air Anomaly: +1371