Survey Identifier: YAQ7309
Format Acronym: MGD77
Data Center File Number: 07010042
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19741216
Source Institution: OREGON STATE UNIVERSITY
Country: U.S.A.
Platform Name: YAQUINA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR. RICHARD COUCH
Project: NAZCA PLATE, YAQUINA LONG OCEAN CRUISE 1973 LEG 9
Funding: ONR
Survey Departure Date (yyyymmdd): 19740330
Port of Departure: BALBOA, PANAMA
Survey Arrival Date (yyyymmdd): 19740421
Port of Arrival: SAN DIEGO, CALIFORNIA
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: SATTELITE, 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: 20 AND 40 CU IN AIRGUNS
Formats of Seismic Data: SINGLE CHANNEL ANALOG, MICROFILM
Topmost Latitude of Survey: +33
Bottommost Latitude: +07
Leftmost Longitude: -118
Rightmost Longitude: -079
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 2 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: 0.03 MGAL PER DAY DRIFT
Departure Base Station Gravity: 9782376
Departure Base Station Description: SEE ADD DOC /19,21
Arrival Base Station Gravity: 9795336
Arrival Base Station Description: SEE ADD DOC /20,21
Additional Documentation: 14 U.S. COMMERCE PIER G=980104.3, 15 WH 1056 WOOLARD AND ROSE 1963 PG 119, 15 WA 453 WOOLARD AND ROSE 1963 PG 94, 15 GRAVITY ANOMALIES CALCULATED ORIGINALLY RELATIVE TO COMM PIER 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)*SUB(LAT)**2
Number of Data Records: 14602
Min/Max Data Record:
Date: 1974 03 30
Latitude: +7.13190
Longitude: -117.22320
Bathymetry, 2- Way Traveltime: 000325
Bathymetry, Corrected Depth: 24.0
Magnetics Total Field, 1st Sensor: 360330
Magnetics Residual Field: -07120
Free-Air Anomaly: -1121
Min/Max Data Record:
Date: 1974 04 21
Latitude: +32.58750
Longitude: -79.56360
Bathymetry, 2- Way Traveltime: 075450
Bathymetry, Corrected Depth: 5699.0
Magnetics Total Field, 1st Sensor: 489630
Magnetics Residual Field: +14690
Free-Air Anomaly: +1351