Survey Identifier: AVON08MV
Format Acronym: MGD77
Data Center File Number: 15020192
Parameters Surveyed Code: 51511
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): JOHN COLOSI, WOODS HOLE
Project: AVON EXPEDITION LEG 8
Funding: ONR
Survey Departure Date (yyyymmdd): 19990619
Port of Departure: HONOLULU, HAWAII
Survey Arrival Date (yyyymmdd): 19990703
Port of Arrival: ASTORIA, OREGON
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
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL TAPE
Topmost Latitude of Survey: 47
Bottommost Latitude: 21
Leftmost Longitude: -160
Rightmost Longitude: -122
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 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: 980712
Arrival Base Station Description: ASTORIA,OREGON PIER 1 FACE
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: 21159
Min/Max Data Record:
Date: 1999 06 19
Latitude: +21.22614
Longitude: -159.57773
Bathymetry, 2- Way Traveltime: 001560
Bathymetry, Corrected Depth: 117.0
Observed Gravity: 9787191
Free-Air Anomaly: -0771
Min/Max Data Record:
Date: 1999 07 03
Latitude: +46.25863
Longitude: -122.38714
Bathymetry, 2- Way Traveltime: 075307
Bathymetry, Corrected Depth: 5687.0
Observed Gravity: 9807150
Free-Air Anomaly: +2249