Survey Identifier: AVON07MV
Format Acronym: MGD77
Data Center File Number: 15020191
Parameters Surveyed Code: 55531
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): E.DRUFFEL (U.C.IRVINE), J.BAUER
Project: AVON EXPEDITION LEG 7
Funding: NSF
Survey Departure Date (yyyymmdd): 19990524
Port of Departure: HONOLULU,HAWAII
Survey Arrival Date (yyyymmdd): 19990615
Port of Arrival: HONOLULU,HAWAII
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: ANAL.REC.,35MM FILM,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: 32
Bottommost Latitude: 21
Leftmost Longitude: -160
Rightmost Longitude: -157
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: 978923
Departure Base Station Description: SNUG HARBOR,HONOLULU,HAWAII
Arrival Base Station Gravity: 978923
Arrival Base Station Description: SNUG HARBOR,HONOLULU,HAWAII
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: 31477
Min/Max Data Record:
Date: 1999 05 24
Latitude: +21.22440
Longitude: -159.37533
Bathymetry, 2- Way Traveltime: 000320
Bathymetry, Corrected Depth: 24.0
Magnetics Total Field, 1st Sensor: 346150
Magnetics Residual Field: -08832
Observed Gravity: 9786468
Free-Air Anomaly: -0680
Min/Max Data Record:
Date: 1999 06 15
Latitude: +31.23588
Longitude: -157.86792
Bathymetry, 2- Way Traveltime: 084373
Bathymetry, Corrected Depth: 6395.0
Magnetics Total Field, 1st Sensor: 389960
Magnetics Residual Field: +06815
Observed Gravity: 9794615
Free-Air Anomaly: +2380