Survey Identifier: IG2403


Format Acronym: MGD77
Data Center File Number: 10020013
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. WATKINS
Project: SURVEYS OF THE MIDDLE AMERICA TRENCH-COSTA RICA AREA-DSDP
Funding: IDOE/IPOD-NSF
Survey Departure Date (yyyymmdd): 19770403
Port of Departure: PUNTA ARENAS COSTA RICA
Survey Arrival Date (yyyymmdd): 19770417
Port of Arrival: ACAJUTLA EL SALVADOR
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 5/8LBCHARGES 3-4 1500CI-AG
Formats of Seismic Data: MYLAR, PAPER, NEGATIVE
Topmost Latitude of Survey: +14
Bottommost Latitude: +09
Leftmost Longitude: -092
Rightmost Longitude: -084
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 CR-8,9; MAS-2,3; GUA-1A,1B
Number of Data Records: 3183

Min/Max Data Record:
Date: 1977 04 03
Latitude: +9.07550
Longitude: -91.87920
Bathymetry, Corrected Depth: 31.0
Magnetics Total Field, 1st Sensor: 371740
Magnetics Residual Field: -07030

Min/Max Data Record:
Date: 1977 04 17
Latitude: +13.81750
Longitude: -84.62850
Bathymetry, Corrected Depth: 5021.0
Magnetics Total Field, 1st Sensor: 403640
Magnetics Residual Field: +06350