Survey Identifier: GLOR05MV
Format Acronym: MGD77
Data Center File Number: 15020147
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): R. HEY
Project: GLORIA LEG 5
Funding: NSF OCE91-00522
Survey Departure Date (yyyymmdd): 19930208
Port of Departure: PAPEETE, TAHITI
Survey Arrival Date (yyyymmdd): 19930320
Port of Arrival: EASTER ISLAND, CHILE
Navigation Instrumentation: GPS TRIMBLE MOD. 4000AX
Geodetic Datum/Position: BEST FIT 2ND ORDER POLYNOMIAL CURVE
Bathymetry Instrumentation: SEABEAM 2000 w/ 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, ANAL. REC.
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG TAPE
Seismic Instrumentation: NONE COLLECTED
Topmost Latitude of Survey: -17
Bottommost Latitude: -33
Leftmost Longitude: -150
Rightmost Longitude: -108
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE AVERAGES EXTRACTED FROM SEABEAM VERTICAL BEAM
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 Gravity: 9786989
Departure Base Station Description: DOD 2080-9 PAPEETE, TAHITI
Arrival Base Station Gravity: 9796192
Arrival Base Station Description: DOD 301-4 VALPARAISO, CHILE
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: 58602
Min/Max Data Record:
Date: 1993 02 08
Latitude: -32.36227
Longitude: -149.58694
Bathymetry, 2- Way Traveltime: 010880
Bathymetry, Corrected Depth: 814.0
Magnetics Total Field, 1st Sensor: 320480
Magnetics Residual Field: -12671
Observed Gravity: 9787132
Free-Air Anomaly: -0283
Min/Max Data Record:
Date: 1993 03 21
Latitude: -17.41683
Longitude: -108.20126
Bathymetry, 2- Way Traveltime: 062947
Bathymetry, Corrected Depth: 4736.0
Magnetics Total Field, 1st Sensor: 364050
Magnetics Residual Field: +10520
Observed Gravity: 9795636
Free-Air Anomaly: +1620