Survey Identifier: NBP92-8
Format Acronym: MGD77
Data Center File Number: 88010007
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19
Source Institution: JET PROPULSION LABORATORY
Country: USA
Platform Name: NATHANIEL B. PALMER
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): CAROL RAYMOND
Project: NATHANIEL B. PALMER CRUISE: NBP92-8
Funding: NAT SCIENCE FNDN
Survey Departure Date (yyyymmdd): 19921213
Port of Departure: PUNTA ARENAS CHILE
Survey Arrival Date (yyyymmdd): 19930129
Port of Arrival: PUNTA ARENAS CHILE
Navigation Instrumentation: ASHTECH GPS
Geodetic Datum/Position: PRIM-ASHTECH GPS,SEC-FURUNO GPS
Bathymetry Instrumentation: ODEC 3.5 KHz
Additional Forms of Bathymetric Data: ANALOG
Magnetics Instrumentation: MAGNETIC GRADIOMETER
Additional Forms of Magnetics Data: DIGITAL RECORDS, ANALOG RECORDS
Gravity Instrumentation: LACOSTE AND ROMBERG S-36
Additional Forms of Gravity Data: DIGITAL RECORDS ONLY
Seismic Instrumentation: 2 210 CU IN G/I AIRGUNS, 1 CHANNELS
Formats of Seismic Data: DIGITAL DATA ON 9-TRACK, ANALOG RCDS
Topmost Latitude of Survey: -52
Bottommost Latitude: -71
Leftmost Longitude: -139
Rightmost Longitude: -060
General Digitizing Rate of Bathymetry: 010
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: 01
Magnetic Sensor Tow Distance: 300
Sensor Depth: 010
Horizontal Sensor Separation: 100
Reference Field Code: 88
Reference Field: IGRF-90
Method of Applying Residual Field: POINT FOR POINT CALCULATION
General Digitizing Rate of Gravity: 100
General Sampling Rate of Gravity: 10
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM (0967)
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Additional Documentation: DATA RECEIVED AT NGDC FROM ANTARCTIC SUPPORT ASSOCIATES.
Number of Data Records: 67398
Min/Max Data Record:
Date: 1992 12 14
Latitude: -70.62296
Longitude: -138.35618
Bathymetry, 2- Way Traveltime: 000933
Bathymetry, Corrected Depth: 70.0
Magnetics Total Field, 1st Sensor: 330519
Magnetics Total Field, 2nd Sensor: 366268
Magnetics Residual Field: -05624
Observed Gravity: 9812791
Free-Air Anomaly: -1373
Min/Max Data Record:
Date: 1993 01 29
Latitude: -52.35083
Longitude: -60.25918
Bathymetry, 2- Way Traveltime: 067973
Bathymetry, Corrected Depth: 5080.0
Magnetics Total Field, 1st Sensor: 583676
Magnetics Total Field, 2nd Sensor: 581102
Magnetics Residual Field: +05712
Observed Gravity: 9826398
Free-Air Anomaly: +0772