Survey Identifier: NAV4158
Format Acronym: ARO88
Data Center File Number: 0550-057
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 C32-053: Flight 4158 ~ 2,948 Nautical Miles
Survey Departure Date (yyyymmdd): 19900609
Survey Arrival Date (yyyymmdd): 19900609
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: 16057
Magnetic Sensitivity: 0.1 nT
Topmost Latitude of Survey: +09
Bottommost Latitude: -34
Leftmost Longitude: -088
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: 16057
Datafile Header Info: PJCT=C32-053 FLGT= 4158 ,MTH= 6,DAY= 9, YR=1990,JDY= 160 -TO- 160,RCD= 16059,NAV=ESG ,CMP=ESG
Min/Max Data Record:
Longitude: -87.5021
Latitude: -33.3808
Mag Total Intensity Calc nT: 25071
Time Gmt Sec: 3473.0640
Mag East Component Obs nT: 21165
Mag North Component Obs nT: -830
Mag Horizontal Intensity Calc nT: 21278
Mag Vertical Intensity Obs nT: -14005
Mag Declination Calc Deg: -1.6227
Mag Inclination Calc Deg: -33.1180
Mag Total Intensity Obs nT: 25121
Alt Barometric Ft: 100
Min/Max Data Record:
Longitude: -70.7868
Latitude: 8.8594
Mag Total Intensity Calc nT: 37082
Time Gmt Sec: 36108.8828
Mag East Component Obs nT: 29314
Mag North Component Obs nT: 3082
Mag Horizontal Intensity Calc nT: 29326
Mag Vertical Intensity Obs nT: 22695
Mag Declination Calc Deg: 6.5147
Mag Inclination Calc Deg: 37.8644
Mag Total Intensity Obs nT: 35865
Alt Barometric Ft: 26900