Survey Identifier: RAIT01WT


Format Acronym: MGD77
Data Center File Number: 15040214
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19881130
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): M. PURDY
Project: RAITT LEG 1
Survey Departure Date (yyyymmdd): 19880109
Port of Departure: SAN DIEGO, CALIF
Survey Arrival Date (yyyymmdd): 19880207
Port of Arrival: ACAPULCO, 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
Seismic Instrumentation: NONE COLLECTED
Topmost Latitude of Survey: +34
Bottommost Latitude: +09
Leftmost Longitude: -119
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: 9795353
Departure Base Station Description: SIO MARFAC PIER, SAN DIEGO
Arrival Base Station Gravity: 9785096
Arrival Base Station Description: DOD1753-2,ACAPULCO, MEXICO
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, 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: 43026

Min/Max Data Record:
Date: 1988 01 08
Latitude: +9.13017
Longitude: -118.11095
Bathymetry, 2- Way Traveltime: 003120
Bathymetry, Corrected Depth: 236.0
Magnetics Total Field, 1st Sensor: 355910
Magnetics Residual Field: -04244
Observed Gravity: 9779313
Free-Air Anomaly: -1609

Min/Max Data Record:
Date: 1988 02 08
Latitude: +33.73583
Longitude: -99.88558
Bathymetry, 2- Way Traveltime: 071413
Bathymetry, Corrected Depth: 5386.0
Magnetics Total Field, 1st Sensor: 471570
Magnetics Residual Field: +05118
Observed Gravity: 9796370
Free-Air Anomaly: +0831