Survey Identifier: CRGN04WT
Format Acronym: MGD77
Data Center File Number: 15040175
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): C.DE MOUSTIER,P.LONSDALE
Project: CROSSGRAIN LEG 4
Funding: UC GENERAL
Survey Departure Date (yyyymmdd): 19870604
Port of Departure: HILO,HAWAII
Survey Arrival Date (yyyymmdd): 19870607
Port of Arrival: HONOLULU,HAWAII
Navigation Instrumentation: SATNAV/GPS,AUTO LOG GYRO+2D DOPPLER SPD
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERT.BEAM(2&2/3DEG)&3.5KHZ(WIDE)
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD G-801/3
Additional Forms of Magnetics Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG.TAPE
Seismic Instrumentation: 20-300CU.IN.AIRGUN,DIGITAL,1 CHANNEL
Formats of Seismic Data: ANAL.REC,35MM FILM,DIGITAL MAG.TAPE
Topmost Latitude of Survey: +22
Bottommost Latitude: +19
Leftmost Longitude: -158
Rightmost Longitude: -153
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H20
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: 1 MINUTE AVERAGES EXTRACTED FROM SEABEAM VERTICAL BEAMS
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF-1985
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 10
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: IGSN-71
Departure Base Station Gravity: 8559601
Departure Base Station Description: Sand Island pier,Honolulu
Arrival Base Station Gravity: 8559601
Arrival Base Station Description: Sand Island pier,Honolulu
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. GRAVITY SPIKES AND STEPS PRESENT DUE TO RESIDUAL NAVIGTION ERRORS, GRAVITY REPROCESSED, NOV 1988
Number of Data Records: 5122
Min/Max Data Record:
Date: 1987 06 04
Latitude: +19.56894
Longitude: -157.86217
Bathymetry, 2- Way Traveltime: 003467
Bathymetry, Corrected Depth: 264.0
Magnetics Total Field, 1st Sensor: 346750
Magnetics Residual Field: -09251
Observed Gravity: 9785133
Free-Air Anomaly: -1348
Min/Max Data Record:
Date: 1987 06 07
Latitude: +21.26483
Longitude: -153.78361
Bathymetry, 2- Way Traveltime: 073947
Bathymetry, Corrected Depth: 5582.0
Magnetics Total Field, 1st Sensor: 359330
Magnetics Residual Field: +03150
Observed Gravity: 9789764
Free-Air Anomaly: +3098