Survey Identifier: FAR481
Format Acronym: MGD77
Data Center File Number: 19120004
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19850207
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES, UK
Country: UNITED KINGDOM
Platform Name: FARNELLA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): R. C. SEARLE
Project: FARNELLA CRUISE 4/81
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19811128
Port of Departure: PONTA DELGADA, AZORES
Survey Arrival Date (yyyymmdd): 19811216
Port of Arrival: BELEM
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: PRIME SAT
Bathymetry Instrumentation: PRECISION ECHO SOUNDER - IOS MK 3
Additional Forms of Bathymetric Data: ANALOGUE
Magnetics Instrumentation: BARINGER PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOGUE
Gravity Instrumentation: LACOSTE AND ROMBERG S84
Additional Forms of Gravity Data: ANALOGUE
Topmost Latitude of Survey: +38
Bottommost Latitude: +06
Leftmost Longitude: -052
Rightmost Longitude: -025
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: IGSN71
Corrections Applied: CROSS COUPLING + EOTVOS
Departure Base Station Gravity: 9801144
Departure Base Station Description: PONTA DELGADA WHOI 855
Arrival Base Station Gravity: 9780246
Arrival Base Station Description: BELEM 32918 O
Additional Documentation: GRAVITY STA PONTA IS IGSN71 ESTIMATE OF WHOI POTSDAM VALUE, BELEM BASE STA INFORMATION AVAILABLE FROM RVS,BARRY,WALES, NO DRIFT INFORMATION
Number of Data Records: 12864
Min/Max Data Record:
Date: 1981 11 28
Latitude: +6.83190
Longitude: -51.59470
Bathymetry, Corrected Depth: 813.0
Magnetics Total Field, 1st Sensor: 334000
Magnetics Residual Field: -09630
Free-Air Anomaly: -8420
Min/Max Data Record:
Date: 1981 12 16
Latitude: +37.67960
Longitude: -25.73020
Bathymetry, Corrected Depth: 5673.0
Magnetics Total Field, 1st Sensor: 450350
Magnetics Residual Field: -00450
Free-Air Anomaly: +9950