Survey Identifier: DI84L1-2
Format Acronym: MGD77
Data Center File Number: 19100007
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19830406
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES, UK
Country: UNITED KINGDOM
Platform Name: DISCOVERY
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): A. S. LAUGHTON
Project: DISCOVERY CRUISE 84 LEG1,LEG2
Funding: BRITISH GOVERNMENT
Survey Departure Date (yyyymmdd): 19770616
Port of Departure: BARRY, WALES
Survey Arrival Date (yyyymmdd): 19770728
Port of Arrival: LISBON, PORTUGAL
Navigation Instrumentation: MAGNAVOX SATELLITE RECEIVER
Geodetic Datum/Position: SAT PLUS DR
Bathymetry Instrumentation: IOS PES MARK 3 10KHZ 20DEG 2DEG SWEEP
Additional Forms of Bathymetric Data: ANALOGUE
Magnetics Instrumentation: PROTON PRECESSION VARIAN V75
Additional Forms of Magnetics Data: ANALOGUE
Gravity Instrumentation: ASKANIA GSS3
Additional Forms of Gravity Data: ANALOGUE
Topmost Latitude of Survey: +65
Bottommost Latitude: +38
Leftmost Longitude: -036
Rightmost Longitude: -009
General Digitizing Rate of Bathymetry: 060
General Sampling Rate of Bathymetry: 2 SEC
Assumed Sound Velocity: 08000
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
General Digitizing Rate of Magnetics: 020
General Sampling Rate of Magnetics: 02
Magnetic Sensor Tow Distance: 0250
Reference Field Code: 04
Reference Field: IGRF 75
Method of Applying Residual Field: LIN INTERP 1*1 DEG SQUARE
General Digitizing Rate of Gravity: 020
General Sampling Rate of Gravity: 01
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: CROSS COUPLING
Departure Base Station Gravity: 9811903
Departure Base Station Description: BARRY DOCK, WALES
Arrival Base Station Gravity: 9822663
Arrival Base Station Description: REYJAVIK J
Additional Documentation: MID-CRUISE PORT REYJAVIK, ICELAND 5-JUL-77 TO 28-JUL-77, END-OF-CRUISE GRAVITY TIE AT LISBON A 980075.7 MGALS IGSN71
Number of Data Records: 26742
Min/Max Data Record:
Date: 1977 06 16
Latitude: +38.65930
Longitude: -35.63270
Bathymetry, Corrected Depth: 76.0
Magnetics Total Field, 1st Sensor: 439240
Magnetics Residual Field: -20450
Free-Air Anomaly: -0880
Min/Max Data Record:
Date: 1977 07 28
Latitude: +64.17070
Longitude: -9.48380
Bathymetry, Corrected Depth: 5387.0
Magnetics Total Field, 1st Sensor: 549360
Magnetics Residual Field: +29810
Free-Air Anomaly: +1560