Survey Identifier: PANR04MV
Format Acronym: MGD77
Data Center File Number: 15020177
Parameters Surveyed Code: 55531
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): J.KARSTEN,UHI; E.KLEIN,DUKE U.
Project: PANORAMA EXPEDITION LEG 4
Funding: NSF
Survey Departure Date (yyyymmdd): 19980115
Port of Departure: VALPARAISO,CHILE
Survey Arrival Date (yyyymmdd): 19980302
Port of Arrival: EASTER ISLAND
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-G886
Additional Forms of Magnetics Data: DIGITAL TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL TAPE
Formats of Seismic Data: NONE COLLECTED
Topmost Latitude of Survey: -27
Bottommost Latitude: -44
Leftmost Longitude: -110
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: 979619.
Departure Base Station Description: 0DOD301-3VALPARAISO,CHILE
Arrival Base Station Gravity: 978698.
Arrival Base Station Description: 9DOD2080-9PAPEETE,TAHITI
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. (GRAVITY COLLECTED BUT NOT EDITED.), 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; Ship draft 5; Surface sound velocity sensor.
Number of Data Records: 67604
Min/Max Data Record:
Date: 1998 01 14
Latitude: -43.05162
Longitude: -109.46937
Bathymetry, 2- Way Traveltime: 001693
Bathymetry, Corrected Depth: 126.0
Magnetics Total Field, 1st Sensor: 251600
Magnetics Residual Field: -06511
Observed Gravity: 9765710
Free-Air Anomaly: -1851
Min/Max Data Record:
Date: 1998 03 02
Latitude: -27.13933
Longitude: -71.60895
Bathymetry, 2- Way Traveltime: 074987
Bathymetry, Corrected Depth: 5646.0
Magnetics Total Field, 1st Sensor: 336520
Magnetics Residual Field: +06992
Observed Gravity: 9805367
Free-Air Anomaly: +1252