Survey Identifier: BMRG05MV
Format Acronym: MGD77
Data Center File Number: 15020185
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 20040507
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): J.C. SEMPERE & D.CHRISTIE
Project: BOOMERANG EXPEDITION LEG 5
Funding: NFS OCE94-00707
Survey Departure Date (yyyymmdd): 19960116
Port of Departure: HOBART,TASMANIA
Survey Arrival Date (yyyymmdd): 19960217
Port of Arrival: FREMANTLE,AUSTRALIA
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: LINEAR FIT TO 60 SEC FIXES
Bathymetry Instrumentation: SEABEAM 2000 w/SIDESCAN &3.5KHZ
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 TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL TAPE
Seismic Instrumentation: WATERGUNS
Formats of Seismic Data: ANAL.REC, 35MM FILM, DIGITAL TAPE
Topmost Latitude of Survey: -31
Bottommost Latitude: -51
Leftmost Longitude: 114
Rightmost Longitude: 148
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE VALUES EXTRACTED FROM SEABEAM VERTICAL BEAM
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
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: 9804178
Departure Base Station Description: DOD3687-7 HOBART,TASMANIA
Arrival Base Station Gravity: 9794001
Arrival Base Station Description: DOD2023-1 FREMANTLE,AUSTRALIA
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. NAVIGATION: DR BETWEEN 1 MINUTE, INTERVAL GPS PCODE MODE FIXES. 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 NAVIGATION. 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: 45959
Min/Max Data Record:
Date: 1996 01 16
Latitude: -50.39287
Longitude: +114.31628
Bathymetry, 2- Way Traveltime: 000987
Bathymetry, Corrected Depth: 74.0
Magnetics Total Field, 1st Sensor: 600690
Magnetics Residual Field: -47030
Observed Gravity: 9793182
Free-Air Anomaly: -6871
Min/Max Data Record:
Date: 1996 02 17
Latitude: -31.93107
Longitude: +147.49691
Bathymetry, 2- Way Traveltime: 076200
Bathymetry, Corrected Depth: 5750.0
Magnetics Total Field, 1st Sensor: 664870
Magnetics Residual Field: +08310
Observed Gravity: 9811561
Free-Air Anomaly: +0888