Survey Identifier: SEAB0BWT
Format Acronym: MGD77
Data Center File Number: 15040229
Parameters Surveyed Code: 51131
File Creation Date (yyyymmdd): 19
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V THOMAS WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): MAMMERICKX,TYCE,ABBOTT,PAVLICEK
Project: SEABEAM TEST B
Survey Departure Date (yyyymmdd): 19811218
Port of Departure: SAN DIEGO,CALIFORNIA
Survey Arrival Date (yyyymmdd): 19811223
Port of Arrival: SAN DIEGO,CALIFORNIA
Navigation Instrumentation: ITT Transit Satellite Receiver, Mod 5001
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERT.BEAM(2&2/3DEG)&3.5KHZ(WIDE)
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Topmost Latitude of Survey: +34
Bottommost Latitude: +32
Leftmost Longitude: -122
Rightmost Longitude: -117
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1TO10SECONDS
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 88
Interpolation Scheme: 1 MINUTE INTERVAL
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY. SYST_COMMENTS DEPTH CORRECTED FOR SHIP DRAFT (5M), 12.158 kHz, 16 beams. NAVI_INSTRU Amatec-Straza 2-D Doppler speed log, Sperry MK-27 Gyro. REAL TIME SWATHS BOOKS ON MICROFILM, NAVIGATION USED FOR PROCESSING WAS LORAN ONLY, NGDC has multibeam bathymetric data for this cruise, however the tracklines, found here in GEODAS may not exactly correspond to the multibm data available.
Number of Data Records: 5986
Min/Max Data Record:
Date: 1981 12 18
Latitude: +32.50536
Longitude: -121.19971
Bathymetry, 2- Way Traveltime: 001400
Bathymetry, Corrected Depth: 105.0
Min/Max Data Record:
Date: 1981 12 22
Latitude: +33.28312
Longitude: -117.44366
Bathymetry, 2- Way Traveltime: 053947
Bathymetry, Corrected Depth: 4033.0