Survey Identifier: AVON02MV


Format Acronym: MGD77
Data Center File Number: 15020188
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 20040518
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V MELVILLE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): HUBERT STAUDIGEL, SCRIPPS
Project: AVON EXPEDITION LEG 2
Funding: NSF
Survey Departure Date (yyyymmdd): 19990126
Port of Departure: MAJURO MARSHALL ISLANDS
Survey Arrival Date (yyyymmdd): 19990309
Port of Arrival: PAGO PAGO
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: 08
Bottommost Latitude: -15
Leftmost Longitude: 170
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: 973810.
Departure Base Station Description: 14MAJURO,MARSHALL IS.
Arrival Base Station Gravity: 978625.
Arrival Base Station Description: 55DOD2050-2PAGO PAGO HARBOR
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. FOLLOWING INFO FROM MULTIBEAM, BATHYMETRY: Heading Sensor Sperry MK 23 Gyro; Vertical reference unit sensor, Datawell Hippy Model 120; Navigation: Horizontal_Datum WGS84; Uncorrected, meters, assumed SV 1500m/sec; Ship draft 5; Surface sound velocity sensor.
Number of Data Records: 63358

Min/Max Data Record:
Date: 1999 01 24
Latitude: -14.44811
Longitude: -179.99938
Bathymetry, 2- Way Traveltime: 000520
Bathymetry, Corrected Depth: 39.0
Magnetics Total Field, 1st Sensor: 331550
Magnetics Residual Field: -24629
Observed Gravity: 9779142
Free-Air Anomaly: -0587

Min/Max Data Record:
Date: 1999 03 09
Latitude: +7.25121
Longitude: +179.99888
Bathymetry, 2- Way Traveltime: 080040
Bathymetry, Corrected Depth: 6059.0
Magnetics Total Field, 1st Sensor: 562700
Magnetics Residual Field: +38180
Observed Gravity: 9786811
Free-Air Anomaly: +2978