Survey Identifier: BAJA75
Format Acronym: MGD77
Data Center File Number: 07120001
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19770323
Source Institution: OREGON STATE UNIVERSITY
Country: U.S.A.
Platform Name: DM 20
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): MICHAEL GEMPERLE
Project: BAJA 1975
Funding: ONR, MEXICO
Survey Departure Date (yyyymmdd): 19750706
Port of Departure: ENSENADA, MEXICO
Survey Arrival Date (yyyymmdd): 19750806
Port of Arrival: ENSENADA, MEXICO
Navigation Instrumentation: OMEGA, RADAR, VISUAL
Geodetic Datum/Position: RADAR, VISUAL / DEAD RECKONING
Bathymetry Instrumentation: 12 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
Topmost Latitude of Survey: +32
Bottommost Latitude: +22
Leftmost Longitude: -118
Rightmost Longitude: -106
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 2.5 SEC SWEE
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
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: -.11 MGAL PER DAY DRIFT
Departure Base Station Gravity: 9795177
Departure Base Station Description: SEE ADD DOC /19,20,21
Arrival Base Station Gravity: 9795177
Arrival Base Station Description: SEE ADD DOC /19,20,21
Additional Documentation: 14 U.S. COMMERCE PIER G=980104.3, 15 OSU BASE STATION ON B STREET PIER WHICH IS TIED TO WA 453, WOLLARD AND, 15 ROSE 1963 PG 94 MINUS 14.5 MGAL=979519.1 TO REFLECT U.S. COMMERCE PIER, 15 G=980104.3
Number of Data Records: 11468
Min/Max Data Record:
Date: 1975 07 06
Latitude: +22.29330
Longitude: -117.51830
Bathymetry, 2- Way Traveltime: 000175
Bathymetry, Corrected Depth: 13.0
Magnetics Total Field, 1st Sensor: 433530
Magnetics Residual Field: -05590
Free-Air Anomaly: -1329
Min/Max Data Record:
Date: 1975 08 06
Latitude: +31.74670
Longitude: -106.47170
Bathymetry, 2- Way Traveltime: 060500
Bathymetry, Corrected Depth: 4540.0
Magnetics Total Field, 1st Sensor: 490040
Magnetics Residual Field: +16710
Free-Air Anomaly: +1057