Survey Identifier: CRGN03WT


Format Acronym: MGD77
Data Center File Number: 15040174
Parameters Surveyed Code: 51531
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): D.CRONAN
Project: CROSSGRAIN LEG 3
Funding: NSF
Survey Departure Date (yyyymmdd): 19870430
Port of Departure: PAPEETE,TAHITI
Survey Arrival Date (yyyymmdd): 19870603
Port of Arrival: HILO,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: NONE COLLECTED
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG.TAPE
Seismic Instrumentation: NONE COLLECTED
Topmost Latitude of Survey: +20
Bottommost Latitude: -18
Leftmost Longitude: -163
Rightmost Longitude: -149
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 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: 9789237
Arrival Base Station Description: HIG SNUG HARBOR,HONOLULU
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. GRAVITY SPIKES AND STEPS PRESENT DUE TO RESIDUAL NAVIGTION ERRORS, GRAVITY REPROCESSED, NOV 1988. PRESENT IN FILE FOR 30APR-04MAY ONLY. PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY
Number of Data Records: 48182

Min/Max Data Record:
Date: 1987 04 29
Latitude: -17.54122
Longitude: -162.96988
Bathymetry, 2- Way Traveltime: 006147
Bathymetry, Corrected Depth: 466.0
Observed Gravity: 9781509
Free-Air Anomaly: -0984

Min/Max Data Record:
Date: 1987 06 03
Latitude: +19.83767
Longitude: -149.56650
Bathymetry, 2- Way Traveltime: 087493
Bathymetry, Corrected Depth: 6640.0
Observed Gravity: 9789104
Free-Air Anomaly: +2269