Survey Identifier: DILANTLS
Format Acronym: MGD77
Data Center File Number: 03030004
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19800209
Source Institution: ESSA
Country: UNITED STATES
Platform Name: DISCOVERER
Platform Type Code: 1
Platform Type: SHIP
Project: RP-6-DI-70 LESSER ANTILLES
Survey Departure Date (yyyymmdd): 19700907
Port of Departure: LAT. 13.3267 LON. -59.6683
Survey Arrival Date (yyyymmdd): 19700911
Port of Arrival: LAT. 13.5164 LON. -59.4751
Navigation Instrumentation: SATELLITE/ VISUAL BEARINGS
Bathymetry Instrumentation: NARROW BEAM SOUNDING DEVICE
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: PROTON PRECESSION MAGNETONMETER
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: GRAF-ASKANIA #23
Additional Forms of Gravity Data: ANALOG RECORDS
Topmost Latitude of Survey: +15
Bottommost Latitude: +13
Leftmost Longitude: -062
Rightmost Longitude: -059
General Digitizing Rate of Bathymetry: 128
Assumed Sound Velocity: 14630
Interpolation Scheme: 13
General Digitizing Rate of Magnetics: 67
Magnetic Sensor Tow Distance: 0122
Reference Field Code: 03
Reference Field: IGRF-65
General Digitizing Rate of Gravity: 243
Reference System Code: 2
Reference System: INTERNAT'L 1930
Corrections Applied: DRIFT: +.8 MGALS/DAY, EOTVUS CORR
Departure Base Station Gravity: 9782997
Departure Base Station Description: SEAWALL AIRPORT, BARBADOS
Arrival Base Station Gravity: 9790455
Arrival Base Station Description: DOGDE ISLAND, MIAMI, FLA.
Additional Documentation: WARNING: MGD77 DATA RECORDS FOR THIS CRUISE MAY CONTAIN NEGATIVE GRAVITY, ANOMALY VALUES THAT SHOULD BE POSITIVE.
Number of Data Records: 942
Min/Max Data Record:
Date: 1970 09 07
Latitude: +13.32670
Longitude: -61.10670
Bathymetry, 2- Way Traveltime: 000700
Bathymetry, Corrected Depth: 53.0
Magnetics Total Field, 1st Sensor: 383910
Magnetics Residual Field: -04010
Free-Air Anomaly: -1478
Min/Max Data Record:
Date: 1970 09 11
Latitude: +14.56670
Longitude: -59.47510
Bathymetry, 2- Way Traveltime: 041450
Bathymetry, Corrected Depth: 3109.0
Magnetics Total Field, 1st Sensor: 397330
Magnetics Residual Field: +04520
Free-Air Anomaly: -0004