Survey Identifier: BMRG04MV
Format Acronym: MGD77
Data Center File Number: 15020151
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 (J.CHARTERS&S.MOGK)
Project: BOOMERANG EXPEDITION LEG 4
Funding: NFS OCE94-00707
Survey Departure Date (yyyymmdd): 19960107
Port of Departure: DUNEDIN,NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19960111
Port of Arrival: HOBART,TASMANIA
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
Topmost Latitude of Survey: -42
Bottommost Latitude: -48
Leftmost Longitude: 147
Rightmost Longitude: 171
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: 9807275
Departure Base Station Description: DOD0249-9 DUNEDIN,N.ZEALAND
Arrival Base Station Gravity: 9804178
Arrival Base Station Description: DOD3687-7 HOBART,TASMANIA
Additional Documentation: PROCESSED BY SIO GEOLOGICAL DATA CENTER. DEPTHS CORRECTED FOR 5 METER SHIP, DRAFT. NAVIGATION: DR BETWEEN 1 MINUTE INTERVAL GPS PCODE 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; Surface sound velocity sensor.
Number of Data Records: 6077
Min/Max Data Record:
Date: 1996 01 07
Latitude: -47.36434
Longitude: +147.33688
Bathymetry, 2- Way Traveltime: 000173
Bathymetry, Corrected Depth: 12.0
Magnetics Total Field, 1st Sensor: 611820
Magnetics Residual Field: -02365
Observed Gravity: 9804320
Free-Air Anomaly: -0823
Min/Max Data Record:
Date: 1996 01 11
Latitude: -42.88367
Longitude: +170.83293
Bathymetry, 2- Way Traveltime: 071787
Bathymetry, Corrected Depth: 5409.0
Magnetics Total Field, 1st Sensor: 626990
Magnetics Residual Field: +03115
Observed Gravity: 9809691
Free-Air Anomaly: +1210