Survey Identifier: AVON03MV
Format Acronym: MGD77
Data Center File Number: 15020200
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 20040507
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): STANLEY HART, WOODS HOLE
Project: AVON EXPEDITION LEG 3
Funding: NSF
Survey Departure Date (yyyymmdd): 19990311
Port of Departure: PAGO PAGO,AMERICAN SAMOA
Survey Arrival Date (yyyymmdd): 19990317
Port of Arrival: APIA, WESTERN SAMOA
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: ANALOG RECORDS, DIGITAL 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
Topmost Latitude of Survey: -13
Bottommost Latitude: -15
Leftmost Longitude: -172
Rightmost Longitude: -168
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: 978625.
Departure Base Station Description: 55 DOD2050-2 PAGO PAGO HARBOR
Arrival Base Station Gravity: 978610.
Arrival Base Station Description: 20 DOD3763-1 APIA OBSERVATORY
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT, 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.
Number of Data Records: 12771
Min/Max Data Record:
Date: 1999 03 09
Latitude: -14.70876
Longitude: -171.76414
Bathymetry, 2- Way Traveltime: 000573
Bathymetry, Corrected Depth: 43.0
Magnetics Total Field, 1st Sensor: 366920
Magnetics Residual Field: -19593
Observed Gravity: 9780322
Free-Air Anomaly: -0215
Min/Max Data Record:
Date: 1999 03 18
Latitude: -13.79024
Longitude: -168.08519
Bathymetry, 2- Way Traveltime: 067467
Bathymetry, Corrected Depth: 5083.0
Magnetics Total Field, 1st Sensor: 662030
Magnetics Residual Field: +75801
Observed Gravity: 9786658
Free-Air Anomaly: +2976