Survey Identifier: SHACK475


Format Acronym: MGD77
Data Center File Number: 19050003
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 4/75
Funding: BRITISH GOVERNMENT
Survey Departure Date (yyyymmdd): 19750418
Port of Departure: DUBAI
Survey Arrival Date (yyyymmdd): 19750507
Port of Arrival: BOMBAY, INDIA
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: +27
Bottommost Latitude: +18
Leftmost Longitude: +055
Rightmost Longitude: +073
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: 9789061
Departure Base Station Description: DUBAI AIRPORT
Arrival Base Station Gravity: 9786557
Arrival Base Station Description: BOMBAY AIRPORT
Number of Data Records: 13529

Min/Max Data Record:
Date: 1975 04 18
Latitude: +18.15290
Longitude: +55.62100
Bathymetry, Corrected Depth: 211.0
Magnetics Total Field, 1st Sensor: 405030
Magnetics Residual Field: -02460
Free-Air Anomaly: -9960

Min/Max Data Record:
Date: 1975 05 07
Latitude: +26.44010
Longitude: +72.69410
Bathymetry, Corrected Depth: 4032.0
Magnetics Total Field, 1st Sensor: 436280
Magnetics Residual Field: +03960
Free-Air Anomaly: +9950