Survey Identifier: NAV4172


Format Acronym: ARO88
Data Center File Number: 0560-045
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: Donald R. Wilson
Project: Project Magnet: Project D32-451: Flight 4172 ~ 3,216 Nautical Miles
Survey Departure Date (yyyymmdd): 19931113
Survey Arrival Date (yyyymmdd): 19931114
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: 15790
Magnetic Sensitivity: 0.1 nT
Topmost Latitude of Survey: -27
Bottommost Latitude: -36
Leftmost Longitude: -110
Rightmost Longitude: -058
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: 15790
Datafile Header Info: PJCT=D32-451 FLGT= 4172 ,MTH= 11,DAY= 13, YR=1993,JDY= 317 -TO- 318,RCD= 15792,NAV=GPS ,CMP=RLG

Min/Max Data Record:
Longitude: -109.2658
Latitude: -35.6930
Mag Total Intensity Calc nT: 23837
Time Gmt Sec: 0.9490
Mag East Component Obs nT: 19291
Mag North Component Obs nT: -1803
Mag Horizontal Intensity Calc nT: 19365
Mag Vertical Intensity Obs nT: -19474
Mag Declination Calc Deg: -999.0000
Mag Inclination Calc Deg: -999.0000
Mag Total Intensity Obs nT: 23840
Alt Barometric Ft: 1237

Min/Max Data Record:
Longitude: -58.4836
Latitude: -26.9990
Mag Total Intensity Calc nT: 33332
Time Gmt Sec: 86398.9531
Mag East Component Obs nT: 26331
Mag North Component Obs nT: 7575
Mag Horizontal Intensity Calc nT: 27390
Mag Vertical Intensity Obs nT: -10467
Mag Declination Calc Deg: 16.0570
Mag Inclination Calc Deg: -24.4939
Mag Total Intensity Obs nT: 33321
Alt Barometric Ft: 25033