Survey Identifier: SHACK375
Format Acronym: MGD77
Data Center File Number: 19050002
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19831202
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES
Country: UNITED KINGDOM
Platform Name: SHACKLETON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): R. B. WHITMARSH
Project: SHACKLETON CRUISE 3/75
Funding: BRITISH GOVERNMENT
Survey Departure Date (yyyymmdd): 19750327
Port of Departure: DJIBOUTI
Survey Arrival Date (yyyymmdd): 19750415
Port of Arrival: DUBAI
Navigation Instrumentation: MAGNAVOX SATELLITE RECEIVER
Geodetic Datum/Position: SAT PLUS DR
Bathymetry Instrumentation: IOS PES MARK 3 10KHZ 20DEG 2SEC SWEEP
Additional Forms of Bathymetric Data: ANALOGUE
Magnetics Instrumentation: PROTON PRECESION VARIAN TYPE 4937
Additional Forms of Magnetics Data: ANALOGUE
Gravity Instrumentation: LACOSTE-ROMBERG S40
Additional Forms of Gravity Data: ANALOGUE
Topmost Latitude of Survey: +24
Bottommost Latitude: +12
Leftmost Longitude: +046
Rightmost Longitude: +064
General Digitizing Rate of Bathymetry: 020
General Sampling Rate of Bathymetry: 2 SEC
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: 2 MINUTE LINEAR INTERPOLATION FROM 6 MIN SAMPLES
General Digitizing Rate of Magnetics: 020
General Sampling Rate of Magnetics: 02
Magnetic Sensor Tow Distance: 0500
Reference Field Code: 04
Reference Field: IGRF 75
Method of Applying Residual Field: LIN. INTERP 1X1 DEG SQUARE
General Digitizing Rate of Gravity: 020
General Sampling Rate of Gravity: 1
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 2
Reference System: POTSDAM
Corrections Applied: DRIFT + EOTVOS
Departure Base Station Gravity: 9782550
Departure Base Station Description: DJIBOUTI PORT STA 22
Arrival Base Station Gravity: 9789061
Arrival Base Station Description: DUBAI AIRPORT
Number of Data Records: 6531
Min/Max Data Record:
Date: 1975 03 29
Latitude: +12.80310
Longitude: +46.12060
Bathymetry, Corrected Depth: 327.0
Magnetics Total Field, 1st Sensor: 219800
Magnetics Residual Field: -08760
Free-Air Anomaly: -9960
Min/Max Data Record:
Date: 1975 04 07
Latitude: +23.57550
Longitude: +63.57730
Bathymetry, Corrected Depth: 4107.0
Magnetics Total Field, 1st Sensor: 432520
Magnetics Residual Field: +07010
Free-Air Anomaly: +9980