Survey Identifier: RAIT02WT


Format Acronym: MGD77
Data Center File Number: 15040187
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19880823
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): R. BATIZA
Project: RAITT LEG 2
Survey Departure Date (yyyymmdd): 19880211
Port of Departure: ACAPULCO, MEXICO
Survey Arrival Date (yyyymmdd): 19880313
Port of Arrival: MANZANILLO,MEXICO
Navigation Instrumentation: SATNAV/GPS,AUTO LOG GYRO+2D DOPPLER SPD
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
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD G-801/3
Additional Forms of Magnetics Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG.TAPE
Topmost Latitude of Survey: +20
Bottommost Latitude: +05
Leftmost Longitude: -106
Rightmost Longitude: -099
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H20
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
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
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 10
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: IGSN-71
Departure Base Station Gravity: 9785096
Departure Base Station Description: DOD1753-2,ACAPULCO,MEXICO
Arrival Base Station Gravity: 9795353
Arrival Base Station Description: SIO MARFAC PIER, SAN DIEGO
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. GRAVITY: 1 SEC METER COUNTS FILTERED WITH 25 POLE FILTER WITH 180 SEC DELAY. FREE AIR SPIKES PRESENT AT CSE/SPD CHANGES BECAUSE NAVIGATION, NOT FILTERED SIMILARILY.
Number of Data Records: 45673

Min/Max Data Record:
Date: 1988 02 11
Latitude: +5.32899
Longitude: -105.70630
Bathymetry, 2- Way Traveltime: 005947
Bathymetry, Corrected Depth: 448.0
Magnetics Total Field, 1st Sensor: 338660
Magnetics Residual Field: -05755
Observed Gravity: 9779911
Free-Air Anomaly: -1369

Min/Max Data Record:
Date: 1988 03 14
Latitude: +19.07078
Longitude: -99.89096
Bathymetry, 2- Way Traveltime: 070000
Bathymetry, Corrected Depth: 5276.0
Magnetics Total Field, 1st Sensor: 420030
Magnetics Residual Field: +40602
Observed Gravity: 9785881
Free-Air Anomaly: +1109