Survey Identifier: ENCR02WT
Format Acronym: MGD77
Data Center File Number: 15040236
Parameters Surveyed Code: 55331
File Creation Date (yyyymmdd): 19
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): P.LONSDALE
Project: ENCORE LEG 2
Funding: NSF/OCE91-03919
Survey Departure Date (yyyymmdd): 19920509
Port of Departure: MANZANILLO, MEXICO
Survey Arrival Date (yyyymmdd): 19920514
Port of Arrival: SAN DIEGO, CALIFORNIA
Navigation Instrumentation: GPS,AUTO LOG GYRO+2D DOPPLER SPD
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERTICAL BEAM (2&2/3 DEG)&3.5KHZ
Additional Forms of Bathymetric Data: NONE COLLECTED
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD G-801/3
Additional Forms of Magnetics Data: DIGITAL MAG. TAPE,ANAL. REC,35MM FILM
Gravity Instrumentation: SEE COMMENT
Seismic Instrumentation: NONE COLLECTED
Topmost Latitude of Survey: +33
Bottommost Latitude: +19
Leftmost Longitude: -118
Rightmost Longitude: -104
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE AVERAGES EXTRACTED FROM SEABEAM VERTICAL BEAMS
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF-1985
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
Additional Documentation: BOTH RECORDERS WERE USED FOR EXPLOSIVE SURVEYS - NO ANALOGUE DEPTH RECORDS, SYST_COMMENTS DEPTHS CORRECTED FOR 5 METER SHIP DRAFT, 16 beams, 12.158 kHz, time instrumentation = Hewlett-Packard HP-5065A rubidium frequency standard, NAVI_INSTRU Amatec-Straza 2-D Doppler speed log, Sperry MK-27 Gyro, NAVIGATION: DR CSE/SPD BETWEEN 10 MINUTE INTERVAL GPS FIXES, GPS PRESENT 23+ HRS/DAY, GRAVITY COLLECTED BY J.HILDEBRAND ON LACOSTE GRAVITYMETER
Number of Data Records: 6123
Min/Max Data Record:
Date: 1992 05 09
Latitude: +19.01342
Longitude: -117.23617
Bathymetry, 2- Way Traveltime: 001240
Bathymetry, Corrected Depth: 93.0
Magnetics Total Field, 1st Sensor: 417410
Magnetics Residual Field: -03947
Min/Max Data Record:
Date: 1992 05 14
Latitude: +32.70667
Longitude: -104.29983
Bathymetry, 2- Way Traveltime: 061187
Bathymetry, Corrected Depth: 4597.0
Magnetics Total Field, 1st Sensor: 460790
Magnetics Residual Field: +02616