Survey Identifier: LEG177JR
Format Acronym: MGD77
Data Center File Number: 23060083
Parameters Surveyed Code: 55113
File Creation Date (yyyymmdd): 19980917
Source Institution: OCEAN DRILLING PROGRAM/TEXAS A&M
Country: USA+ODP MEMBERS
Platform Name: JOIDES RESOLUTION
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): R. Gersonde, D. Hodell, P. Blum
Project: OCEAN DRILLING PROGRAM, LEG 177
Funding: NSF+ODP MEMBERS
Survey Departure Date (yyyymmdd): 19971209
Port of Departure: Cape Town, South Africa
Survey Arrival Date (yyyymmdd): 19980206
Port of Arrival: Punta Arenas, Chile
Navigation Instrumentation: MX1107 GPS
Geodetic Datum/Position: GPS FIXES AT 1 MIN INTERVALS
Bathymetry Instrumentation: PDR-105B
Additional Forms of Bathymetric Data: ANALOG RECORDS & MICROFILM
Magnetics Instrumentation: EGG 886
Additional Forms of Magnetics Data: ANALOG RECORDS & MICROFILM
Gravity Instrumentation: NONE COLLECTED
Seismic Instrumentation: NONE COLLECTED
Topmost Latitude of Survey: -33
Bottommost Latitude: -57
Leftmost Longitude: -071
Rightmost Longitude: 019
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Magnetic Sensor Tow Distance: 0450
Sensor Depth: 00100
Horizontal Sensor Separation: 000
Reference Field Code: 00
Reference Field: UNUSED
Additional Documentation: ORIGINAL RECORDS ARCHIVED AT ODP, NGDC REMOVED TIMES IN MGD77 DATA RECORDS AFTER 05 FEBRUARY 1998, DUE TO, IMPOSSIBLY LARGE CALCULATED SHIP SPEEDS. NOTE: MGD77 FILE CREATED FROM WINFROG RAW FILES USING WF2MGD77 V1.5
Number of Data Records: 65564
Min/Max Data Record:
Date: 1998 01 01
Latitude: -56.88744
Longitude: -70.90345
Bathymetry, 2- Way Traveltime: 002533
Bathymetry, Corrected Depth: 190.0
Magnetics Total Field, 1st Sensor: 201740
Min/Max Data Record:
Date: 1998 02 06
Latitude: +10.87754
Longitude: +18.32787
Bathymetry, 2- Way Traveltime: 104000
Bathymetry, Corrected Depth: 7881.0
Magnetics Total Field, 1st Sensor: 650780