Survey Identifier: CH115L09
Format Acronym: MGD77
Data Center File Number: 02010069
Parameters Surveyed Code: 555
File Creation Date (yyyymmdd): 1982 524
Source Institution: WOODS HOLE OCEANOGRAPHIC INST
Country: U.S.A.
Platform Name: CHAIN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): SCOTT MCDOWELL
Project: CURISE 115, LEG 9
Funding: NSF
Survey Departure Date (yyyymmdd): 19740624
Port of Departure: GEORGETOWN, BARBADOS
Survey Arrival Date (yyyymmdd): 19740630
Port of Arrival: WOODS HOLE,U.S.A.
Navigation Instrumentation: 706 SATELLITE RECEIVER
Geodetic Datum/Position: SAT.MERGED WITH SHIP VELOCITY
Bathymetry Instrumentation: PRIM-3.5,SEC-12, WIDE BEAM 1 SEC.SWEEP
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: VARIAN PROTON-PRECESSION MAG.V-85
Additional Forms of Magnetics Data: ANALOG RECORDS, PUNCHED TAPE
Gravity Instrumentation: ARPA-1 VIBRATING STRING ACCELEROMETER
Additional Forms of Gravity Data: ANALOG RECORDS, PUNCHED TAPE
Topmost Latitude of Survey: +42
Bottommost Latitude: +13
Leftmost Longitude: -072
Rightmost Longitude: -059
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: ONE/SECOND
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: 5-MINUTES AND BREAK SLOPE
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 03
Magnetic Sensor Tow Distance: 250
Reference Field Code: 04
Reference Field: IGRF 1975
Method of Applying Residual Field: LINER INTERPOLATION WITHIN DEGREE SQUARE
General Digitizing Rate of Gravity: 050
General Sampling Rate of Gravity: 60
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IGA SYSTEM 1967
Reference System Code: 3
Reference System: IGSN 71
Corrections Applied: DRIFT=-1.23MGAL/DAY BIAS=-241.33
Arrival Base Station Gravity: 9803267
Arrival Base Station Description: WHOI BASE STATION 602/317
Number of Data Records: 3562
Min/Max Data Record:
Date: 1974 06 24
Latitude: +13.17379
Longitude: -71.17490
Bathymetry, 2- Way Traveltime: 000575
Bathymetry, Corrected Depth: 43.0
Magnetics Total Field, 1st Sensor: 377870
Magnetics Residual Field: -06200
Observed Gravity: 9781929
Free-Air Anomaly: -2748
Min/Max Data Record:
Date: 1974 06 30
Latitude: +41.02750
Longitude: -59.68730
Bathymetry, 2- Way Traveltime: 094825
Bathymetry, Corrected Depth: 7245.0
Magnetics Total Field, 1st Sensor: 559270
Magnetics Residual Field: +02760
Observed Gravity: 9802619
Free-Air Anomaly: +0598