Survey Identifier: YAQ7308
Format Acronym: MGD77
Data Center File Number: 07010041
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19741204
Source Institution: OREGON STATE UNIVERSITY
Country: U.S.A.
Platform Name: YAQUINA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR. STEPHEN JOHNSON
Project: NAZCA PLATE, YAQUINA LONG OCEAN CRUISE 1973 LEG 8
Funding: IDOE
Survey Departure Date (yyyymmdd): 19740319
Port of Departure: CALLAO, PERU
Survey Arrival Date (yyyymmdd): 19740327
Port of Arrival: BALBOA, PANAMA
Navigation Instrumentation: SATELLITE
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 300 CU IN AIRGUNS (SEE ADD DOC/18
Formats of Seismic Data: SINGLE CHANNEL ANALOG, MICROFILM
Topmost Latitude of Survey: +09
Bottommost Latitude: -13
Leftmost Longitude: -084
Rightmost Longitude: -077
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 /19
Corrections Applied: 0.05 MGAL PER DAY
Departure Base Station Gravity: 9783127
Departure Base Station Description: SEE ADD DOC /20,22
Arrival Base Station Gravity: 9782376
Arrival Base Station Description: SEE ADD DOC /21,22
Additional Documentation: 09 SONOBUOY REFRACTION WIDE ANGLE ALSO RECORDED, 14 U.S. COMMERCE PIER G=980104.3, 15 WH 1068 WOOLARD AND ROSE 1963 PG 121, 15 WH1056 WOOLARD AND ROSE 1963 PG 119, 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)*SIN(LAT)**2
Number of Data Records: 5109
Min/Max Data Record:
Date: 1974 03 19
Latitude: -12.01580
Longitude: -83.06570
Bathymetry, 2- Way Traveltime: 000200
Bathymetry, Corrected Depth: 15.0
Magnetics Total Field, 1st Sensor: 277400
Magnetics Residual Field: -06550
Free-Air Anomaly: -1606
Min/Max Data Record:
Date: 1974 03 27
Latitude: +8.89620
Longitude: -77.28170
Bathymetry, 2- Way Traveltime: 084000
Bathymetry, Corrected Depth: 6366.0
Magnetics Total Field, 1st Sensor: 373860
Magnetics Residual Field: +01970
Free-Air Anomaly: +1148