Survey Identifier: NAV4138
Format Acronym: ARO88
Data Center File Number: 0550-047
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 C32-953: Flight 4138 ~ 3,677 Nautical Miles
Survey Departure Date (yyyymmdd): 19890628
Survey Arrival Date (yyyymmdd): 19890628
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: 19945
Magnetic Sensitivity: 0.1 nT
Topmost Latitude of Survey: +17
Bottommost Latitude: -18
Leftmost Longitude: -150
Rightmost Longitude: -099
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: 19945
Datafile Header Info: PJCT=C32-953 FLGT= 4138 ,MTH= 6,DAY= 28, YR=1989,JDY= 179 -TO- 179,RCD= 19947,NAV=ESG ,CMP=ESG
Min/Max Data Record:
Longitude: -149.4776
Latitude: -17.4274
Mag Total Intensity Calc nT: 31559
Time Gmt Sec: 21723.5649
Mag East Component Obs nT: 29326
Mag North Component Obs nT: 3628
Mag Horizontal Intensity Calc nT: 29562
Mag Vertical Intensity Obs nT: -18673
Mag Declination Calc Deg: 6.9994
Mag Inclination Calc Deg: -30.5051
Mag Total Intensity Obs nT: 31536
Alt Barometric Ft: 1000
Min/Max Data Record:
Longitude: -99.5428
Latitude: 16.7768
Mag Total Intensity Calc nT: 40998
Time Gmt Sec: 65538.8721
Mag East Component Obs nT: 31606
Mag North Component Obs nT: 6825
Mag Horizontal Intensity Calc nT: 32101
Mag Vertical Intensity Obs nT: 28318
Mag Declination Calc Deg: 12.3818
Mag Inclination Calc Deg: 43.7686
Mag Total Intensity Obs nT: 40986
Alt Barometric Ft: 27100