Survey Identifier: BMRG08MV
Format Acronym: MGD77
Data Center File Number: 15020158
Parameters Surveyed Code: 55513
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): S.BLOOMER
Project: BOOMERANG EXPEDITION LEG 8
Survey Departure Date (yyyymmdd): 19960507
Port of Departure: SUVA,FIJI
Survey Arrival Date (yyyymmdd): 19960608
Port of Arrival: PAGO PAGO,SAMOA
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: WATERGUN
Formats of Seismic Data: ANAL.REC, 35MM FILM, DIGITAL TAPE
Topmost Latitude of Survey: -14
Bottommost Latitude: -27
Leftmost Longitude: 178
Rightmost Longitude: -170
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: DOD 2023-1 FREEMANTLE AUS
Arrival Base Station Gravity: 9786424
Arrival Base Station Description: DOD 2050-1 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. GPS PRESENT 24 HRS/DAY. GRAVITY: 1 SEC METER COUNTS, FILTERED WITH 99 DEC STD.DEV. GAUSSIAN CONVOLUTION WINDOW. FREE AIR ANOMALY, SPIKES PRESENT BECAUSE SAME FILTER NOT USED FOR NAVIGATION. FOLLOWING INFO, FROM MULTIBEAM BATHYMETRY: Heading Sensor Sperry MK23 Gyro; Vertical reference, unit sensor Datawell Hippy Model 120; Navigation: Horizontal_Datum WGS84.
Number of Data Records: 46949
Min/Max Data Record:
Date: 1996 05 07
Latitude: -26.23081
Longitude: -179.99958
Bathymetry, 2- Way Traveltime: 000253
Bathymetry, Corrected Depth: 18.0
Magnetics Total Field, 1st Sensor: 384450
Magnetics Residual Field: -06507
Observed Gravity: 9780710
Free-Air Anomaly: -3141
Min/Max Data Record:
Date: 1996 06 08
Latitude: -14.21275
Longitude: +179.99829
Bathymetry, 2- Way Traveltime: 139240
Bathymetry, Corrected Depth: 10808.0
Magnetics Total Field, 1st Sensor: 467410
Magnetics Residual Field: +11024
Observed Gravity: 9791412
Free-Air Anomaly: +2968