Survey Identifier: DI103A
Format Acronym: MGD77
Data Center File Number: 19100013
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19850130
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES, UK
Country: UNITED KINGDOM
Platform Name: DISCOVERY
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): R. C. SEARLE
Project: DISCOVERY CRUISE 103 PART A
Funding: BRITISH GOVT.
Survey Departure Date (yyyymmdd): 19790709
Port of Departure: DJIBOUTI
Survey Arrival Date (yyyymmdd): 19790718
Port of Arrival: SUEZ
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: LA COSTE AND ROMBERG S40
Additional Forms of Gravity Data: ANALOGUE
Topmost Latitude of Survey: +16
Bottommost Latitude: +11
Leftmost Longitude: +041
Rightmost Longitude: +053
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: 0100
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
Additional Documentation: GRAVITY BASE STATION DATA - REFER TO PRINCIPAL SCIENTIST
Number of Data Records: 6379
Min/Max Data Record:
Date: 1979 07 09
Latitude: +11.61780
Longitude: +41.56830
Bathymetry, Corrected Depth: 38.0
Magnetics Total Field, 1st Sensor: 228120
Magnetics Residual Field: -29120
Free-Air Anomaly: -1250
Min/Max Data Record:
Date: 1979 07 18
Latitude: +15.91470
Longitude: +52.46500
Bathymetry, Corrected Depth: 5355.0
Magnetics Total Field, 1st Sensor: 387480
Magnetics Residual Field: +04920
Free-Air Anomaly: +1070