Survey Identifier: L1281NP
Format Acronym: MGD77
Data Center File Number: 06050060
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19880504
Source Institution: USGS Branch of Pacific Marine Geology
Country: United States
Platform Name: Lee
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Don Tompkins
Survey Departure Date (yyyymmdd): 19810919
Port of Departure: LV REDWOOD CITY
Survey Arrival Date (yyyymmdd): 19811005
Port of Arrival: ARRIVE TREASURE ISLAND
Navigation Instrumentation: SATNAV,INTAEGRATED NAV,LORAN C
Geodetic Datum/Position: SATNAV,LORAN C
Bathymetry Instrumentation: 12KHZ NARROW 1 SEC,3.5KHZ WIDE 1 SEC
Additional Forms of Bathymetric Data: ANALOG
Magnetics Instrumentation: PROTON PRECESSION MAG-GEOMETRICS G-801
Additional Forms of Magnetics Data: ANALOG
Gravity Instrumentation: L&R S-53
Additional Forms of Gravity Data: ANALOG
Seismic Instrumentation: UNIBOOM, SINGLE CHANNEL,24 CHANNEL
Formats of Seismic Data: ANALOG ROLLS, DIGITAL
Topmost Latitude of Survey: +46
Bottommost Latitude: +37
Leftmost Longitude: -131
Rightmost Longitude: -122
General Digitizing Rate of Bathymetry: 19
General Sampling Rate of Bathymetry: 20/SECONDS
Assumed Sound Velocity: 14630
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 04
Magnetic Sensor Tow Distance: 213
Reference Field Code: 04
Reference Field: IGRF-75
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN NAV PTS
General Digitizing Rate of Gravity: 20
Departure Base Station Gravity: 9799515
Departure Base Station Description: PIER 5 REDWOOD CITY
Arrival Base Station Gravity: 9799774
Arrival Base Station Description: PIER 21 TREASURE ISLAND
Number of Data Records: 22831
Min/Max Data Record:
Date: 1981 09 19
Latitude: +37.50423
Longitude: -130.79813
Bathymetry, 2- Way Traveltime: 010844
Bathymetry, Corrected Depth: 804.0
Magnetics Total Field, 1st Sensor: 484700
Magnetics Residual Field: -31827
Observed Gravity: 9798382
Free-Air Anomaly: -3941
Min/Max Data Record:
Date: 1981 10 05
Latitude: +45.35836
Longitude: -122.11998
Bathymetry, 2- Way Traveltime: 060020
Bathymetry, Corrected Depth: 4497.0
Magnetics Total Field, 1st Sensor: 543640
Magnetics Residual Field: +28673
Observed Gravity: 9806950
Free-Air Anomaly: +2070