Survey Identifier: NAV4139
Format Acronym: ARO88
Data Center File Number: 0550-048
Parameters Surveyed Code: FXD
File Creation Date (yyyymmdd): 19940506
Source Institution: US Naval Oceanographic Office
Country: INTERNATIONAL
Platform Name: RP-3D ORION
Platform Type Code: 3
Platform Type: PLANE
Chief Scientists: Virgil R. Bettencourt
Project: Project Magnet: Project C32-954: Flight 4139 ~ 3,536 Nautical Miles
Survey Departure Date (yyyymmdd): 19890912
Survey Arrival Date (yyyymmdd): 19890912
Flight Line Spacings: Single Flight Line, Variable Directions
Magnetometers Used: Vector and Scalar Magnetometers
Aircraft Altitude: 25,000 FT AG
Aircraft Velocity: 240 Knots
Sampling Rate: 2
Sensor Tow Distance: STINGER
Total Observations: 18503
Magnetic Sensitivity: 0.1 nT
Topmost Latitude of Survey: -53
Bottommost Latitude: -65
Leftmost Longitude: -120
Rightmost Longitude: -070
Archive NGDC Tape Letter: W
Additional Documentation: To remove high frequency noise, a low pass filter has been applied to all the, flight line data above 15,000 feet. Data at the beginning and end of a flight, are noisy because the aircraft is maneuvering during it's climb or descent to, or from survey altitude which is approximately 25,000 feet. Data below 15,000, feet or climb and descent data are not smoothed.
Number of Data Records: 18503
Datafile Header Info: PJCT=C32-954 FLGT= 4139 ,MTH= 9,DAY= 12, YR=1989,JDY= 255 -TO- 255,RCD= 18505,NAV=ESG ,CMP=ESG
Min/Max Data Record:
Longitude: -119.9673
Latitude: -64.9989
Mag Total Intensity Calc nT: 33348
Time Gmt Sec: 2900.4480
Mag East Component Obs nT: 15622
Mag North Component Obs nT: 5521
Mag Horizontal Intensity Calc nT: 20748
Mag Vertical Intensity Obs nT: -47589
Mag Declination Calc Deg: 14.6662
Mag Inclination Calc Deg: -66.4149
Mag Total Intensity Obs nT: 33410
Alt Barometric Ft: 200
Min/Max Data Record:
Longitude: -70.5759
Latitude: -53.0026
Mag Total Intensity Calc nT: 51928
Time Gmt Sec: 40679.8428
Mag East Component Obs nT: 21237
Mag North Component Obs nT: 13707
Mag Horizontal Intensity Calc nT: 22953
Mag Vertical Intensity Obs nT: -25134
Mag Declination Calc Deg: 41.1648
Mag Inclination Calc Deg: -48.8288
Mag Total Intensity Obs nT: 51954
Alt Barometric Ft: 33100