Survey Identifier: HY4-881
Format Acronym: MGD77
Data Center File Number: 16030001
Parameters Surveyed Code: 555
File Creation Date (yyyymmdd): 19940408
Source Institution: GuangZhou Marine Geological Survey MGMR
Country: P.R.CHINA
Platform Name: HAI YANG-4
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): WANG GUANGYU
Project: HY4-881
Survey Departure Date (yyyymmdd): 19880509
Port of Departure: GUANG ZHOU P.R.CHINA
Survey Arrival Date (yyyymmdd): 19881221
Port of Arrival: GUANG ZHOU P.R.CHINA
Navigation Instrumentation: SAT.
Geodetic Datum/Position: SATELLITE
Bathymetry Instrumentation: Rayfheon 12KHZ
Magnetics Instrumentation: MAG-GRADIOMETER G821G
Gravity Instrumentation: KSS-5
Topmost Latitude of Survey: +12
Bottommost Latitude: +07
Leftmost Longitude: -154
Rightmost Longitude: -138
General Digitizing Rate of Bathymetry: 145
General Digitizing Rate of Magnetics: 135
Reference Field: IGRF-85
General Digitizing Rate of Gravity: 143
Theoretical Gravity Formula Code: 8
Theoretical Gravity Formula: CASSINIS 30
Number of Data Records: 2973
Min/Max Data Record:
Date: 1988 06 01
Latitude: +0.37531
Longitude: -153.00349
Bathymetry, Corrected Depth: 3188.1
Magnetics Total Field, 1st Sensor: 328324
Magnetics Residual Field: -30058
Observed Gravity: 9778810
Free-Air Anomaly: -2792
Min/Max Data Record:
Date: 1988 11 23
Latitude: +11.30116
Longitude: +151.26708
Bathymetry, Corrected Depth: 6410.1
Magnetics Total Field, 1st Sensor: 518403
Magnetics Residual Field: +98476
Observed Gravity: 9784627
Free-Air Anomaly: +3105