Survey Identifier: CRGN02WT
Format Acronym: MGD77
Data Center File Number: 15040173
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): NATLAND J.,MCNUTT M.
Project: CROSSGRAIN LEG 2
Funding: NSF
Survey Departure Date (yyyymmdd): 19870331
Port of Departure: PAPEETE,TAHITI
Survey Arrival Date (yyyymmdd): 19870425
Port of Arrival: PAPEETE,TAHITI
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: 35MM FILM,DIGITAL MAG.TAPE
Seismic Instrumentation: WATERGUN SOURCE, DIGITAL, 1 CHANNEL
Formats of Seismic Data: ANAL.REC,35MM FILM,DIGITAL MAG.TAPE
Topmost Latitude of Survey: -05
Bottommost Latitude: -18
Leftmost Longitude: -150
Rightmost Longitude: -134
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: 9786989
Departure Base Station Description: PAPEETE DOD 2080-9
Arrival Base Station Gravity: 9786989
Arrival Base Station Description: PAPEETE DOD 2080-9
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: 36992
Min/Max Data Record:
Date: 1987 03 31
Latitude: -17.54133
Longitude: -149.97554
Bathymetry, 2- Way Traveltime: 000547
Bathymetry, Corrected Depth: 41.0
Magnetics Total Field, 1st Sensor: 323010
Magnetics Residual Field: -05513
Observed Gravity: 9772926
Free-Air Anomaly: -9205
Min/Max Data Record:
Date: 1987 04 25
Latitude: -5.67126
Longitude: -134.99757
Bathymetry, 2- Way Traveltime: 070947
Bathymetry, Corrected Depth: 5352.0
Magnetics Total Field, 1st Sensor: 372760
Magnetics Residual Field: +07644
Observed Gravity: 9787619
Free-Air Anomaly: +2499