Survey Identifier: BMRG03MV
Format Acronym: MGD77
Data Center File Number: 15020156
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): E.DRUFFEL
Project: BOOMERANG EXPEDITION LEG 3
Funding: NFS OCE94-00707
Survey Departure Date (yyyymmdd): 19951211
Port of Departure: CHATHAM IS.,NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19960103
Port of Arrival: DUNEDIN,NEW ZEALAND
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: -43
Bottommost Latitude: -55
Leftmost Longitude: 170
Rightmost Longitude: -176
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: 9786989
Departure Base Station Description: DOD2080-9 PAPEETE,TAHITI
Arrival Base Station Gravity: 9807275
Arrival Base Station Description: DOD0249-9 DUNEDIN,N.ZEALAND
Additional Documentation: PROCESSED BY DAN SCHEIRER, R/V MELVILLE. FINAL MINOR PROCESSING BY SIO/GDC, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. NAVIGATION: DR BETWEEN 1 MINUTE, INTERVAL GPS 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.
Number of Data Records: 34556
Min/Max Data Record:
Date: 1995 12 10
Latitude: -54.16848
Longitude: -179.99862
Bathymetry, 2- Way Traveltime: 000373
Bathymetry, Corrected Depth: 27.0
Magnetics Total Field, 1st Sensor: 574600
Magnetics Residual Field: -04609
Observed Gravity: 9807042
Free-Air Anomaly: -0419
Min/Max Data Record:
Date: 1996 01 03
Latitude: -43.93077
Longitude: +179.99945
Bathymetry, 2- Way Traveltime: 085533
Bathymetry, Corrected Depth: 6467.0
Magnetics Total Field, 1st Sensor: 610150
Magnetics Residual Field: +09075
Observed Gravity: 9814528
Free-Air Anomaly: +1110