Survey Identifier: SOJN02MV
Format Acronym: MGD77
Data Center File Number: 15020160
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): R.HAYMON, UCSB
Project: SOJOURN EXPEDITION LEG 2
Funding: NSF OCE94-00707
Survey Departure Date (yyyymmdd): 19961028
Port of Departure: PAPEETE, TAHITI
Survey Arrival Date (yyyymmdd): 19961210
Port of Arrival: VALPARAISO, CHILE
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: WGS-84; 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: -17
Bottommost Latitude: -34
Leftmost Longitude: -150
Rightmost Longitude: -071
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 Description: extrapolated from PAPEETE
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. NAVIGATION: PCODE GPS UNTIL 0000Z/, 1DEC96; C/A CODE THEREAFTER. 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: 61780
Min/Max Data Record:
Date: 1996 10 28
Latitude: -33.02098
Longitude: -149.58880
Bathymetry, 2- Way Traveltime: 001760
Bathymetry, Corrected Depth: 132.0
Magnetics Total Field, 1st Sensor: 306550
Magnetics Residual Field: -05141
Observed Gravity: 9759718
Free-Air Anomaly: -6596
Min/Max Data Record:
Date: 1996 12 10
Latitude: -17.16088
Longitude: -71.60944
Bathymetry, 2- Way Traveltime: 059760
Bathymetry, Corrected Depth: 4492.0
Magnetics Total Field, 1st Sensor: 342660
Magnetics Residual Field: +02814
Observed Gravity: 9856906
Free-Air Anomaly: +8753