Survey Identifier: DI107L3
Format Acronym: MGD77
Data Center File Number: 19100019
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19850131
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES, UK
Country: UNITED KINGDOM
Platform Name: DISCOVERY
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): R. B. WHITMARSH
Project: DISCOVERY CRUISE 107 LEG 3
Funding: BRITISH GOVT.
Survey Departure Date (yyyymmdd): 19800122
Port of Departure: PUERTO RICO
Survey Arrival Date (yyyymmdd): 19800209
Port of Arrival: ARBADOS
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: +28
Bottommost Latitude: +14
Leftmost Longitude: -066
Rightmost Longitude: -059
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: 978668
Departure Base Station Description: PIER 10 SAN JUAN NO 2
Arrival Base Station Gravity: 978281
Arrival Base Station Description: BRIDGETOWN HARBOUR WHARF (LDGO)
Additional Documentation: SHIP METER G BASE VALUE ON DEPARTURE ARMY QUAY = 978680.2, ON ARRIVAL BRIDGETOWN = 978281.5, DRIFT RATE = - 0.30 MGAL/DAY, BASE STATION VALUES ARE IGSN71 ESTIMATES OF POTSDAM - 14.0
Number of Data Records: 12753
Min/Max Data Record:
Date: 1980 01 22
Latitude: +14.61450
Longitude: -65.03850
Bathymetry, Corrected Depth: 1765.0
Magnetics Total Field, 1st Sensor: 390900
Magnetics Residual Field: -08500
Free-Air Anomaly: -2730
Min/Max Data Record:
Date: 1980 02 09
Latitude: +27.71130
Longitude: -59.50820
Bathymetry, Corrected Depth: 8175.0
Magnetics Total Field, 1st Sensor: 461780
Magnetics Residual Field: -03410
Free-Air Anomaly: +0350