Survey Identifier: DF87
Format Acronym: MGD77
Data Center File Number: 11010003
Parameters Surveyed Code: 50000
File Creation Date (yyyymmdd): 19971029
Source Institution: RICE UNIVERSITY
Country: U.S.A.
Platform Name: USCGC GLACIER
Platform Type Code: 1
Platform Type: SHIP
Project: DEEP FREEZE 87
Survey Departure Date (yyyymmdd): 19870204
Survey Arrival Date (yyyymmdd): 19870224
Topmost Latitude of Survey: -71
Bottommost Latitude: -78
Leftmost Longitude: +162
Rightmost Longitude: -179
General Digitizing Rate of Bathymetry: 211
Additional Documentation: DIGITIZED BY NGDC FROM PAPER RECORDS. FOUND CONFLICTING DATES. PROBLEMS FOUND, AROUND 180 LONGITUDE, WHERE SHIP HEADINGS CONFLICTED WITH ANNOTATIONS OF EAST, OR WEST LONGITUDE. SHIP HEADINGS WERE USED TO DETERMINE EAST OR WEST BETWEEN, 179 E. AND 179 W. DEPTHS WERE ASSUMED TO BE UNCORRECTED METERS, AS WAS, VERIFIED FOR PREVIOUS CRUISES DF85 AND DF86. UNCORRECTED METERS WERE CONVERTED, TO 2-WAY TRAVEL TIME AT 1463 M/SEC.
Number of Data Records: 880
Min/Max Data Record:
Date: 1987 02 04
Latitude: -77.99328
Longitude: -179.95623
Bathymetry, 2- Way Traveltime: 000752
Bathymetry, Corrected Depth: 56.0
Min/Max Data Record:
Date: 1987 02 24
Latitude: -71.94667
Longitude: +179.91187
Bathymetry, 2- Way Traveltime: 026808
Bathymetry, Corrected Depth: 1968.0