Survey Identifier: DI110L2
Format Acronym: MGD77
Data Center File Number: 19100023
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19850201
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 110 LEG 2
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19800523
Port of Departure: LIMA, PERU
Survey Arrival Date (yyyymmdd): 19800618
Port of Arrival: PANAMA
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: +08
Bottommost Latitude: -13
Leftmost Longitude: -106
Rightmost Longitude: -077
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: 9782978
Departure Base Station Description: CALLAO 36827M
Arrival Base Station Gravity: 9782232
Arrival Base Station Description: BALBOA PANAMA JPIER 18 WHOI 823
Additional Documentation: BATHYMETRY - SOME DIGITIZED AT 2 MINS, GRAVITY BASE BALBOA IS IGSN71 ESTIMATE OF POTSDAM 978239.2 AT SHIP METER, ACTUAL BASE STATION DESCRIPTION GIVES POTSDAM G=978237.5 WITHOUT FA CORR, NO LEG DRIFT ONLY TOTAL CRUISE DRIFT OF +0.05 MGAL/DAY - REF CRUISE REPORT
Number of Data Records: 18431
Min/Max Data Record:
Date: 1980 05 23
Latitude: -12.63180
Longitude: -105.96230
Bathymetry, Corrected Depth: 243.0
Magnetics Total Field, 1st Sensor: 269040
Magnetics Residual Field: -40820
Free-Air Anomaly: -1310
Min/Max Data Record:
Date: 1980 06 18
Latitude: +7.66120
Longitude: -77.32330
Bathymetry, Corrected Depth: 6032.0
Magnetics Total Field, 1st Sensor: 358000
Magnetics Residual Field: +05930
Free-Air Anomaly: +8980