Survey Identifier: GLOR08MV
Format Acronym: MGD77
Data Center File Number: 15020137
Parameters Surveyed Code: 55331
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): J. SINTON
Project: GLORIA LEG 8
Funding: NSF OCE91-00522
Survey Departure Date (yyyymmdd): 19930531
Port of Departure: EASTER ISLAND, CHILE
Survey Arrival Date (yyyymmdd): 19930701
Port of Arrival: ACAPULCO, MEXICO
Navigation Instrumentation: GPS TRIMBLE MOD. 4000AX
Geodetic Datum/Position: LINEAR INTERPOLATION BETWEEN FIXES
Bathymetry Instrumentation: SEABEAM 2000 w/ SIDESCAN
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL TAPE
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD G-801/3
Additional Forms of Magnetics Data: DIGITAL TAPE, ANAL. REC.
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL TAPE
Seismic Instrumentation: NONE COLLECTED
Topmost Latitude of Survey: +17
Bottommost Latitude: -28
Leftmost Longitude: -118
Rightmost Longitude: -099
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 BEAMS
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: 9796192
Departure Base Station Description: DOD 301-4 VALPARAISO, CHILE
Arrival Base Station Gravity: 9785096
Arrival Base Station Description: DOD1753-3 ACAPULCO, MEXICO
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 COLLECTED BUT NOT, PROCESSED AS OF AUGUST 1993. 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. Navigation: Horizontal_Datum WGS84.
Number of Data Records: 44782
Min/Max Data Record:
Date: 1993 05 31
Latitude: -27.14366
Longitude: -117.53833
Bathymetry, 2- Way Traveltime: 001573
Bathymetry, Corrected Depth: 118.0
Magnetics Total Field, 1st Sensor: 296200
Magnetics Residual Field: -06380
Min/Max Data Record:
Date: 1993 07 01
Latitude: +16.84867
Longitude: -99.87984
Bathymetry, 2- Way Traveltime: 070680
Bathymetry, Corrected Depth: 5329.0
Magnetics Total Field, 1st Sensor: 372430
Magnetics Residual Field: +06179