Survey Identifier: SOJN06MV
Format Acronym: MGD77
Data Center File Number: 15020163
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): D.LUTHER
Project: SOJOURN EXPEDITION LEG 6
Funding: NSF OCE94-00707
Survey Departure Date (yyyymmdd): 19970307
Port of Departure: HOBART,TASMANIA
Survey Arrival Date (yyyymmdd): 19970406
Port of Arrival: HOBART,TASMANIA
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-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 TAPE
Seismic Instrumentation: NONE
Topmost Latitude of Survey: -42
Bottommost Latitude: -57
Leftmost Longitude: 139
Rightmost Longitude: 148
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: 980437
Departure Base Station Description: BMR6491.0260HOBART,TASMANIA
Arrival Base Station Gravity: 980437
Arrival Base Station Description: BMR9461.0260HOBART,TASMANIA
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: 43381
Min/Max Data Record:
Date: 1997 03 07
Latitude: -56.91932
Longitude: +139.84085
Bathymetry, 2- Way Traveltime: 002053
Bathymetry, Corrected Depth: 153.0
Magnetics Total Field, 1st Sensor: 631550
Magnetics Residual Field: -01494
Observed Gravity: 9770890
Free-Air Anomaly: -0501
Min/Max Data Record:
Date: 1997 04 06
Latitude: -42.88368
Longitude: +147.49889
Bathymetry, 2- Way Traveltime: 066240
Bathymetry, Corrected Depth: 4980.0
Magnetics Total Field, 1st Sensor: 646490
Magnetics Residual Field: +04967
Observed Gravity: 9831929
Free-Air Anomaly: +0652