Survey Identifier: GLOR03MV
Format Acronym: MGD77
Data Center File Number: 15020135
Parameters Surveyed Code: 55531
File Creation Date (yyyymmdd): 19
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): D. FORSYTH
Project: GLORIA LEG 3
Survey Departure Date (yyyymmdd): 19921210
Port of Departure: EASTER ISLAND, CHILE
Survey Arrival Date (yyyymmdd): 19930106
Port of Arrival: PAPEETE, TAHITI
Navigation Instrumentation: GPS TRIMBLE MOD. 4000AX
Geodetic Datum/Position: BEST FIT 2ND ORDER POLYNOMIAL CURVE
Bathymetry Instrumentation: SEABEAM 2000 WITH SIDESCAN & 3.5KHZ
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: DIGITAL MAG. TAPE, ANALOGUE RECORDS
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG TAPE
Seismic Instrumentation: NONE COLLECTED
Topmost Latitude of Survey: -14
Bottommost Latitude: -28
Leftmost Longitude: -150
Rightmost Longitude: -109
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: SEABEAM VERTICAL BEAM: FIRST POINT AFTER EACH MINUTE
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF-1990
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 Description: BACK INTERP. DOD 2080-9 TAHITI
Arrival Base Station Gravity: 9786989
Arrival Base Station Description: DOD 2080-9 PAPEETE, TAHITI
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. GPS PRESENT 23+ HRS/DAY. UNTIL DATA, OFF PROPRIETARY HOLD, CONTACT K.MACDONALD(UCSB)FOR DATA EAST OF 118W Additional_Documentation: D.SANDWELL(SIO)FOR DATA WEST OF 118W. 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 MK 23 Gyro; Vertical reference, unit sensor Datawell Hippy Model 120; Navigation: Horizontal_Datum WGS84
Number of Data Records: 37372
Min/Max Data Record:
Date: 1992 12 11
Latitude: -27.14312
Longitude: -149.60765
Bathymetry, 2- Way Traveltime: 008947
Bathymetry, Corrected Depth: 670.0
Magnetics Total Field, 1st Sensor: 305470
Magnetics Residual Field: -07223
Observed Gravity: 9783046
Free-Air Anomaly: -0705
Min/Max Data Record:
Date: 1993 01 06
Latitude: -14.80224
Longitude: -109.43841
Bathymetry, 2- Way Traveltime: 060800
Bathymetry, Corrected Depth: 4571.0
Magnetics Total Field, 1st Sensor: 368830
Magnetics Residual Field: +06809
Observed Gravity: 9792670
Free-Air Anomaly: +1386