Survey Identifier: IG2405


Format Acronym: MGD77
Data Center File Number: 10020014
Parameters Surveyed Code: 55133
File Creation Date (yyyymmdd): 19880609
Source Institution: UT INSTITUTE FOR GEOPHYSICS
Country: U.S.A.
Platform Name: R/V IDA GREEN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): J.L. WORZEL
Project: SURVEYS OF THE MIDDLE AMERICA TRENCH-MEXICO AREA-DSDP
Funding: IDOE/IPOD-NSF
Survey Departure Date (yyyymmdd): 19770526
Port of Departure: ACAJUTLA EL SALVADOR
Survey Arrival Date (yyyymmdd): 19770616
Port of Arrival: ACAPULCO MEXICO
Navigation Instrumentation: SATELLITE, DEAD RECKONING, RADAR
Geodetic Datum/Position: SATELLITE, DEAD RECKONING
Bathymetry Instrumentation: 3.5 KHZ ECHOSOUNDER
Additional Forms of Bathymetric Data: ANALOG RECORDS, MICROFILM
Magnetics Instrumentation: PROTON PRECESSION MAGNETOMETER
Additional Forms of Magnetics Data: ANALOG CHART RECORD, 35MM MICROFILM
Seismic Instrumentation: 24CHAN-2293M 3-4 1500 CI AIR GUNS
Formats of Seismic Data: MYLAR, PAPER, NEGATIVE
Topmost Latitude of Survey: +17
Bottommost Latitude: +12
Leftmost Longitude: -100
Rightmost Longitude: -089
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1,1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
General Digitizing Rate of Magnetics: 050
Magnetic Sensor Tow Distance: 250.
Reference Field Code: 04
Reference Field: IGRF 75
Additional Documentation: MULTICHANNEL SEISMIC LINES ACQUIRED: GO-1A THRU 1H;OM-2N THRU 6N
Number of Data Records: 5849

Min/Max Data Record:
Date: 1977 05 26
Latitude: +12.08050
Longitude: -99.76380
Bathymetry, Corrected Depth: 19.0
Magnetics Total Field, 1st Sensor: 390080
Magnetics Residual Field: +03630
Seismic Shot-Point Number: 010002

Min/Max Data Record:
Date: 1977 06 16
Latitude: +16.69420
Longitude: -89.98080
Bathymetry, Corrected Depth: 6284.0
Magnetics Total Field, 1st Sensor: 418430
Magnetics Residual Field: +10990
Seismic Shot-Point Number: 016956