Survey Identifier: NBP93-1


Format Acronym: MGD77
Data Center File Number: 88010001
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19930930
Source Institution: UNIV TEXAS INSTITUTE FOR GEOPHYSICS
Country: UNITED STATES
Platform Name: R/V NATHANIEL PALMER
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): LAWERANCE A LAWVER/UNIV.TEXAS
Project: NBP93-1 NATIONAL SCIENCE FOUNDATION
Funding: NSF
Survey Departure Date (yyyymmdd): 19930204
Port of Departure: PUNTA ARENAS, CHILE
Survey Arrival Date (yyyymmdd): 19930320
Port of Arrival: PUNTA ARENAS, CHILE
Navigation Instrumentation: ASHTECH GPS
Geodetic Datum/Position: PRIM-ASHTECH GPS, SEC-FURUNO GPS
Bathymetry Instrumentation: SINGLE BEAM (SEE COMMENTS)
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: EG&G PROTON PRECESSION GRADIOMETER
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: LACOSTE AND ROMBERG
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: 4X210 CI SGI G/I AIRGUNS, SINGLE CHANNEL
Formats of Seismic Data: DIGITAL EXABYTE
Topmost Latitude of Survey: -52
Bottommost Latitude: -67
Leftmost Longitude: -071
Rightmost Longitude: -046
General Digitizing Rate of Bathymetry: 050
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 01
Reference Field Code: 88
Reference Field: IGRF-90
Method of Applying Residual Field: POINT FOR POINT
General Digitizing Rate of Gravity: 101
General Sampling Rate of Gravity: 10
Departure Base Station Gravity: 9813208
Departure Base Station Description: PA-51230N
Arrival Base Station Gravity: 9813208
Arrival Base Station Description: PA-51230N
Additional Documentation: DATA WAS PROCESSED BY ANTARCTIC SUPPORT ASSOCIATES. BATHYMETRY INSTRUMENTATION: <2000M = SIMRAD EK500; >2000M = ODEC 3.5KHZ
Number of Data Records: 63426

Min/Max Data Record:
Date: 1993 02 05
Latitude: -66.98961
Longitude: -70.91150
Bathymetry, 2- Way Traveltime: 000425
Bathymetry, Corrected Depth: 32.0
Magnetics Total Field, 1st Sensor: 322694
Magnetics Residual Field: -04360
Observed Gravity: 9814765
Free-Air Anomaly: -5712

Min/Max Data Record:
Date: 1993 03 21
Latitude: -34.71169
Longitude: +1.59028
Bathymetry, 2- Way Traveltime: 099900
Bathymetry, Corrected Depth: 7550.0
Magnetics Total Field, 1st Sensor: 408196
Magnetics Residual Field: +66470
Observed Gravity: 9830477
Free-Air Anomaly: +9460