Survey Identifier: SOJN01MV
Format Acronym: MGD77
Data Center File Number: 15020159
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19990901
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): D.SCHEIRER
Project: SOJOURN EXPEDITION LEG 1
Funding: NSF OCE94-00707
Survey Departure Date (yyyymmdd): 19960908
Port of Departure: SAN DIEGO, CALIF
Survey Arrival Date (yyyymmdd): 19961021
Port of Arrival: PAPEETE, TAHITI
Navigation Instrumentation: TRIMBLE TASMAN P(Y) GPS
Geodetic Datum/Position: 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: 33
Bottommost Latitude: -21
Leftmost Longitude: -150
Rightmost Longitude: -110
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE VALUES EXTRACTED FROM SEABEAM VERTICAL BEAM
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
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: 9795355
Departure Base Station Description: SIO MARFAC PIER, SAN DIEGO,CA
Arrival Base Station Gravity: 9786989
Arrival Base Station Description: DOD2080-9 PAPEETE,TAHITI
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INST. OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. NAVIGATION: PCODE GPS UNTIL 0000Z/, 1DEC96; C/A CODE THEREAFTER. 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 NAV. 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: 63320
Min/Max Data Record:
Date: 1996 09 07
Latitude: -20.24727
Longitude: -149.60101
Bathymetry, 2- Way Traveltime: 002453
Bathymetry, Corrected Depth: 184.0
Magnetics Total Field, 1st Sensor: 301480
Magnetics Residual Field: -06707
Observed Gravity: 9775279
Free-Air Anomaly: -0621
Min/Max Data Record:
Date: 1996 10 21
Latitude: +32.70799
Longitude: -110.01243
Bathymetry, 2- Way Traveltime: 067920
Bathymetry, Corrected Depth: 5115.0
Magnetics Total Field, 1st Sensor: 474890
Magnetics Residual Field: +05366
Observed Gravity: 9795834
Free-Air Anomaly: +2000