Survey Identifier: X0577ES
Format Acronym: MGD77
Data Center File Number: 16010007
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19840522
Source Institution: FIRST INSTITUTE OF OCEANOGRAPHY
Country: CHINA
Platform Name: XIANGYANGHONG
Platform Type Code: 1
Platform Type: SHIP
Survey Departure Date (yyyymmdd): 19771015
Port of Departure: WUSONG SHANGHAI
Survey Arrival Date (yyyymmdd): 19771122
Port of Arrival: WUSONG SHANGHAI
Navigation Instrumentation: SAT/LORAN
Geodetic Datum/Position: PRIM-SATELLITE SEC-LORAN A
Bathymetry Instrumentation: KSS-2 (MADE IN GERMANY)
Magnetics Instrumentation: SEA-AIR PRECESSION NUCLEAR MAGNETOMETER
Gravity Instrumentation: GSS-2
Topmost Latitude of Survey: +34
Bottommost Latitude: +26
Leftmost Longitude: +123
Rightmost Longitude: +130
General Digitizing Rate of Bathymetry: 109
General Digitizing Rate of Magnetics: 081
Magnetic Sensor Tow Distance: 0420
Sensor Depth: 00020
General Digitizing Rate of Gravity: 100
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNATIONAL 30
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Additional Documentation: DATA CENTER (NGDC) WAS PROVIDED WITH UNCORRECTED DEPTH IN METERS BY CHINA. UNCORRECTED DEPTH WAS CONVERTED TO TWO-WAY TRAVEL TIME BY NGDC USING, 1500 METERS/SECOND. HOWEVER NGDC HAS BEEN UNABLE TO CONFIRM THAT 1500 M/S, IS THE CORRECT VALUE FOR THE ASSUMED SOUND VELOCITY OF THIS ECHO SOUNDER.
Number of Data Records: 4833
Min/Max Data Record:
Date: 1977 10 15
Latitude: +26.51833
Longitude: +123.91666
Bathymetry, 2- Way Traveltime: 000493
Bathymetry, Corrected Depth: 37.0
Magnetics Total Field, 1st Sensor: 441970
Magnetics Residual Field: -03410
Observed Gravity: 9790901
Free-Air Anomaly: -0229
Min/Max Data Record:
Date: 1977 11 22
Latitude: +33.82500
Longitude: +129.01666
Bathymetry, 2- Way Traveltime: 025307
Bathymetry, Corrected Depth: 1890.0
Magnetics Total Field, 1st Sensor: 493880
Magnetics Residual Field: +06160
Observed Gravity: 9796661
Free-Air Anomaly: +0857