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Navigation Data

Navigation files were extracted as a comma-delimited American Standard Code for Information Interchange (ASCII) text file from Fugawi Marine ENC Ver 4. A Garmin GPS 18 PC sensor was used during the flight. Fugawi recorded the following: latitude, longitude, Universal Transverse Mercator (UTM) Easting, UTM Northing, UTM Zone, altitude, local date, UTC date, local time, UTC time, speed, leg bearing, true/magnetic indicator, leg distance, total distance, and sequence number once per second.

Images were acquired using a Nikon D1X camera. The camera's internal clock was synchronized to UTC. Latitude and longitude were recorded in the EXIF header of each image along with the time the images was taken. Image files are named according to the time they were captured. The image filename has the format yyyy_mmdd_hhmmssd.jpg. (For example, image 2009_0519_133636d.jpg was taken May 19, 2009, at 13:36:36 UTC, and "d" designates that a digital camera was used.) Images are associated with GPS positions according to the time of capture, with verification provided by the information stored in the EXIF header. Three cameras were used on this flight. Images taken with the main camera, a Nikon D1X, have filenames with a "d" after the hhmmss. The additional cameras collected imagery whenever an opprotunity presented itself. Images taken with a Canon EOS 20D have "d2" in their filenames, and images taken with a Pentax K100D, have a "d3" in their filenames.

Processed Navigation

The processed navigation file can be accessed from within the nav folder or by clicking the following links: ds946_09ACH01_0519.csv (Areas 1-10) and ds946_09ach01_0522.csv (Area 11) (CSV files). The file contains 12 fields that are defined as follows:

Raw Navigation

Navigation files were extracted as a comma-delimited American Standard Code for Information Interchange (ASCII) text file from Fugawi Marine ENC Ver 4. A Garmin GPS 18 PC sensor was used during the flight. Fugawi recorded the following: latitude, longitude, UTM Easting, UTM Northing, UTM Zone, altitude, local date, UTC date, local time, UTC time, speed, leg bearing, true/magnetic indicator, leg distance, total distance, and sequence number once per second.

The raw navigation files can be accessed from within the nav folder or by clicking the following links: ds946_09ach01_0519_garmin.txt (Areas 1-10), ds946_09ach01_0522_garmin.txt (Area 11) (text files). The file contains 16 fields (separated by a space) that are defined as follows:

Field 1: LATITUDE - latitude (decimal degree) position of aircraft
Field 2: LONGITUDE - longitude (decimal degree) position of aircraft
Field 3: UTM Easting
Field 4: UTM Northing
Field 5: UTM Zone
Field 6: ALTITUDE (meters)
Field 7: LOCAL DATE (yyyymmdd)
Field 8: UTC DATE (yyyymmdd)
Field 9: LOCAL TIME (hhmmss)
Field 10: UTC TIME (hhmmss)
Field 11: SPEED (kilometers per hour)
Field 12: LEG BEARING
Field 13: TRUE/MAGNETIC INDICATOR
Field 14: LEG DISTANCE (meters)
Field 15: TOTAL DISTANCE (meters)
Field 16: SEQUENCE NUMBER - sequential number