Survey Identifier: SOJN08MV


Format Acronym: MGD77
Data Center File Number: 15020165
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 20001129
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): TRANSIT MODE_NO CHIEF SCI.
Project: SOJOURN EXPEDITION LEG 8
Funding: NSF
Survey Departure Date (yyyymmdd): 19970514
Port of Departure: MELBOURNE,AUSTRALIA
Survey Arrival Date (yyyymmdd): 19970526
Port of Arrival: PAPEETE,TAHITI
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: WGS-84; LINEAR FIT TO 60 SEC FIXES
Bathymetry Instrumentation: SEABEAM 2000 w/SIDESCAN
Additional Forms of Bathymetric Data: ANAL.REC.,35MM FILM,DIGITAL MAG. TAPE
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD-G801/3
Additional Forms of Magnetics Data: ANAL.REC.,35MM FILM,DIGITAL MAG. TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL TAPE
Formats of Seismic Data: NONE COLLECTED
Topmost Latitude of Survey: -17
Bottommost Latitude: -40
Leftmost Longitude: 144
Rightmost Longitude: -149
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: ONE MINUTE VALUES EXTRACTED FROM SEABEAM CENTER BEAM
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 88
Reference Field: IGRF-1995
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 01
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: EOTVOS AND METER DRIFT
Departure Base Station Gravity: 9799474
Departure Base Station Description: BMT7090.0101 MELBOURNE,AUSTRAL
Arrival Base Station Gravity: 9787983
Arrival Base Station Description: DOD2080-9 PAPEETE,TAHITI
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. GRAVITY: 1 SEC METER COUNTS FILTERED, WITH 99 SEC STD.DEV.GAUSSIAN CONV.WINDOW. FREE AIR ANOMALY SPIKES MAY BE, PRESENT BECAUSE SAME FILTER NOT USED FOR NAV. FOLLOWING INFO FROM MULTIBEAM, BATHYMETRY: Heading Sensor Sperry MK 23 Gyro; Vertical reference unit sensor, Datawell Hippy Model 120; Navigation: Horizontal_Datum WGS84; Uncorrected, meters, assumed SV 1500m/sec; Ship draft 5; Surface sound velocity sensor.
Number of Data Records: 18407

Min/Max Data Record:
Date: 1997 05 14
Latitude: -39.28538
Longitude: -179.99938
Bathymetry, 2- Way Traveltime: 000267
Bathymetry, Corrected Depth: 20.0
Magnetics Total Field, 1st Sensor: 444100
Magnetics Residual Field: -05020
Observed Gravity: 9781253
Free-Air Anomaly: -8287

Min/Max Data Record:
Date: 1997 05 26
Latitude: -17.50817
Longitude: +179.99710
Bathymetry, 2- Way Traveltime: 120693
Bathymetry, Corrected Depth: 9288.0
Magnetics Total Field, 1st Sensor: 608860
Magnetics Residual Field: +09935
Observed Gravity: 9798167
Free-Air Anomaly: +1952