Survey Identifier: RNDB01WT
Format Acronym: MGD77
Data Center File Number: 15040189
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): J.HILDEBRAND, A.CHAVE
Project: ROUNDABOUT LEG 1
Survey Departure Date (yyyymmdd): 19880429
Port of Departure: SAN DIEGO,CALIF.
Survey Arrival Date (yyyymmdd): 19880515
Port of Arrival: HONOLULU,HAWAII
Navigation Instrumentation: SATNAV/GPS,AUTO LOG GYRO+2D DOPPLER SPD
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERTICAL BEAM (2&2/3 DEG)
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD G-801/3
Additional Forms of Magnetics Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Gravity Instrumentation: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG TAPE
Topmost Latitude of Survey: +36
Bottommost Latitude: +21
Leftmost Longitude: -158
Rightmost Longitude: -117
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE AVERAGES EXTRACTED FROM SEABEAM VERTICAL BEAMS
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF-1985
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 01
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: EOTVOS AND METER DRIFT
Departure Base Station Gravity: 9795355
Departure Base Station Description: SIO MARFAC PIER,SAN DIEGO
Arrival Base Station Gravity: 9789236
Arrival Base Station Description: SNUG HARBOR(PIER 49),HONOLULU
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. GRAVITY: 1 SEC METER COUNTS FILTERED WITH 25 POLE FILTER WITH 148 SEC DELAY. FREE AIR SPIKES PRESENT AT CSE/SPD CHANGES BECAUSE NAVIGATION, NOT FILTERED SIMILARILY.
Number of Data Records: 23144
Min/Max Data Record:
Date: 1988 04 29
Latitude: +21.20052
Longitude: -157.88731
Bathymetry, 2- Way Traveltime: 001760
Bathymetry, Corrected Depth: 132.0
Magnetics Total Field, 1st Sensor: 355270
Magnetics Residual Field: -05924
Observed Gravity: 9787033
Free-Air Anomaly: -0965
Min/Max Data Record:
Date: 1988 05 15
Latitude: +35.75120
Longitude: -117.22526
Bathymetry, 2- Way Traveltime: 074680
Bathymetry, Corrected Depth: 5639.0
Magnetics Total Field, 1st Sensor: 481990
Magnetics Residual Field: +07065
Observed Gravity: 9798548
Free-Air Anomaly: +2377