Survey Identifier: YAQ7301
Format Acronym: MGD77
Data Center File Number: 07010034
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19740904
Source Institution: OREGON STATE UNIVERSITY
Country: U.S.A.
Platform Name: YAQUINA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR. RICHARD JOHNSON
Project: NAZCA PLATE, YAQUINA LONG OCEAN CRUISE 1973 LEG 1
Funding: ONR
Survey Departure Date (yyyymmdd): 19730912
Port of Departure: NEWPORT, OREGON
Survey Arrival Date (yyyymmdd): 19730916
Port of Arrival: SAN DIEGO, CALIFORNIA
Navigation Instrumentation: SATELLITE / LORAN A
Geodetic Datum/Position: SATELLITE / DEAD RECKONING
Bathymetry Instrumentation: 12 AND 3.5 KHZ WIDE BEAM (60 DEG)
Additional Forms of Bathymetric Data: ANALOG RECORDS, MICROFILM
Magnetics Instrumentation: GEOMETRICS G801/3 PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: LACOSTE AND ROMBERG AIR-SEA S-42
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: 40 AND 400 CU. IN. AIRGUNS, ELL, EPC
Formats of Seismic Data: SINGLE CHANNEL ANALOG, MICROFILM
Topmost Latitude of Survey: +45
Bottommost Latitude: +32
Leftmost Longitude: -126
Rightmost Longitude: -117
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1 SEC SWEEP
Assumed Sound Velocity: 14300
Bathymetric Datum Code: 00
Interpolation Scheme: NONE (PEAKS, TROUGHS AND INFLECTIONS DIGITIZED)
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 03
Magnetic Sensor Tow Distance: 215
Sensor Depth: 30
Reference Field Code: 03
Reference Field: IGRF-65
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN NAVIGATION POINTS
General Digitizing Rate of Gravity: 050
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System: SEE ADD DOC / 18
Corrections Applied: NONE
Arrival Base Station Gravity: 9795336
Arrival Base Station Description: WA453 (SEE ADD DOC / 19,20)
Additional Documentation: 14 U.S. COMMERCE PIER G=980104.3, 15 WOLLARD AND ROSE 1963, PG 94, 15 GRAVITY ANOMALIES CALCULATED ORIGINALLY RELATIVE TO COMM. PEIR G=980118.8, 15 AND 1930 THEO. FORMULA THEN ADJUSTED TO NEW COMM. PIER VALUE AND IAG 1967, 15 USING DELTA G(MGAL)=2.65+(-13.695+.135*SIN(LAT)**2)*SIN(LAT)**2
Number of Data Records: 2321
Min/Max Data Record:
Date: 1973 09 12
Latitude: +32.92720
Longitude: -125.35380
Bathymetry, 2- Way Traveltime: 001125
Bathymetry, Corrected Depth: 84.0
Magnetics Total Field, 1st Sensor: 518080
Magnetics Residual Field: -06540
Free-Air Anomaly: -1087
Min/Max Data Record:
Date: 1973 09 16
Latitude: +44.57630
Longitude: -117.62290
Bathymetry, 2- Way Traveltime: 054275
Bathymetry, Corrected Depth: 4059.0
Magnetics Total Field, 1st Sensor: 660590
Magnetics Residual Field: +01830
Free-Air Anomaly: +0162