Survey Identifier: DI111L2
Format Acronym: MGD77
Data Center File Number: 19100025
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19850202
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES, UK
Country: UNITED KINGDOM
Platform Name: DISCOVERY
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): D. ROBERTS
Project: DISCOVERY CRUISE 111 LEG 2
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19800708
Port of Departure: HALIFAX, CANADA
Survey Arrival Date (yyyymmdd): 19800730
Port of Arrival: ST. JOHNS, CANADA
Navigation Instrumentation: MAGNAVOX SATELLITE NAVIGATOR
Geodetic Datum/Position: PRIM-SAT PLUS DEAD RECKONING
Bathymetry Instrumentation: PRECISION ECHO SOUNDER - IOS MK 3
Additional Forms of Bathymetric Data: ANALOGUE
Magnetics Instrumentation: VARIAN V75 PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOGUE
Gravity Instrumentation: LACOSTE AND ROMBERG S84
Additional Forms of Gravity Data: ANALOGUE
Topmost Latitude of Survey: +49
Bottommost Latitude: +41
Leftmost Longitude: -064
Rightmost Longitude: -045
General Digitizing Rate of Bathymetry: 060
General Sampling Rate of Bathymetry: 2/SEC
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
General Digitizing Rate of Magnetics: 020
General Sampling Rate of Magnetics: 02
Magnetic Sensor Tow Distance: 250
Reference Field Code: 04
Reference Field: IGRF-75
Method of Applying Residual Field: LINEAR INTERPOLATION PER DEGREE SQUARE
General Digitizing Rate of Gravity: 060
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: IGSN-71
Corrections Applied: CROSS COUPLING PLUS EOTVOS
Departure Base Station Gravity: 9805630
Departure Base Station Description: BIO HALIFAX 9861-62
Arrival Base Station Gravity: 9808283
Arrival Base Station Description: ST. JOHNS 9363-74
Additional Documentation: TOTAL DRIFT FOR LEG LESS THAN 2 MGAL
Number of Data Records: 15262
Min/Max Data Record:
Date: 1980 07 08
Latitude: +41.22000
Longitude: -63.33150
Bathymetry, Corrected Depth: 90.0
Magnetics Total Field, 1st Sensor: 494900
Magnetics Residual Field: -15420
Free-Air Anomaly: -3880
Min/Max Data Record:
Date: 1980 07 30
Latitude: +48.32880
Longitude: -45.92450
Bathymetry, Corrected Depth: 4628.0
Magnetics Total Field, 1st Sensor: 549200
Magnetics Residual Field: +13990
Free-Air Anomaly: +8280