Survey Identifier: BMRG06MV


Format Acronym: MGD77
Data Center File Number: 15020170
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): K.JOHNSON
Project: BOOMERANG EXPEDITION LEG 6
Funding: NSF OCE94-00707
Survey Departure Date (yyyymmdd): 19960222
Port of Departure: FREMANTLE,AUSTRALIA
Survey Arrival Date (yyyymmdd): 19960415
Port of Arrival: PORT HEDLAND,AUSTRALIA
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: WGS84/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 TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL TAPE
Seismic Instrumentation: NONE COLLECTED
Topmost Latitude of Survey: -19
Bottommost Latitude: -44
Leftmost Longitude: 077
Rightmost Longitude: 119
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: 9794001
Departure Base Station Description: DOD2023-1 FREMANTLE,AUSTRL
Arrival Base Station Gravity: 9786424
Arrival Base Station Description: DOD2050-1 PAGO PAGO,SAMOA
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT - NAVIGATION: DR BETWEEN 1 MINUTE, INTERVAL GPS FIXES:PCODE GPS. 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, BUT MOST OF THERE WERE HAND-EDITED. FOLLOWING INFO FROM MULTIBEAM BATHYMETRY: Heading Sensor Sperry MK 23 Gyro; Navigation: Horizontal_Datum WGS84; Surface sound velocity sensor.
Number of Data Records: 73905

Min/Max Data Record:
Date: 1996 02 22
Latitude: -43.08343
Longitude: +77.03932
Bathymetry, 2- Way Traveltime: 000147
Bathymetry, Corrected Depth: 11.0
Magnetics Total Field, 1st Sensor: 482570
Magnetics Residual Field: -16328
Observed Gravity: 9785110
Free-Air Anomaly: -1111

Min/Max Data Record:
Date: 1996 04 14
Latitude: -19.94435
Longitude: +118.58695
Bathymetry, 2- Way Traveltime: 087333
Bathymetry, Corrected Depth: 6624.0
Magnetics Total Field, 1st Sensor: 595360
Magnetics Residual Field: +27246
Observed Gravity: 9804942
Free-Air Anomaly: +3680