Survey Identifier: DI111L1


Format Acronym: MGD77
Data Center File Number: 19100024
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 1
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19800622
Port of Departure: PANAMA
Survey Arrival Date (yyyymmdd): 19800703
Port of Arrival: HALIFAX, 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: +44
Bottommost Latitude: +09
Leftmost Longitude: -080
Rightmost Longitude: -063
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: 9782232
Departure Base Station Description: BALBOA PANAMA PIER 18 WHOI 823
Arrival Base Station Gravity: 9805630
Arrival Base Station Description: BIO HALIFAX 9861-62
Additional Documentation: IGRF USED MAY BE IGRF-65
Number of Data Records: 7647

Min/Max Data Record:
Date: 1980 06 22
Latitude: +9.72280
Longitude: -79.75650
Bathymetry, Corrected Depth: 145.0
Magnetics Total Field, 1st Sensor: 245840
Magnetics Residual Field: -78180
Free-Air Anomaly: -9890

Min/Max Data Record:
Date: 1980 07 03
Latitude: +43.74970
Longitude: -63.26250
Bathymetry, Corrected Depth: 5420.0
Magnetics Total Field, 1st Sensor: 558900
Magnetics Residual Field: +13650
Free-Air Anomaly: +9260