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Data Series 991

Navigation Data


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Navigation files were extracted as a comma-delimited American Standard Code for Information Interchange (ASCII) text file from a Garmin GPSMAP 60CSx. For each trackpoint, the Garmin GPSMAP 60CSx recorded the following: latitude, longitude, date/time, altitude, depth, leg length, leg time, leg speed, and leg course.

The images were acquired by using a Canon Powershot A720 IS. The camera was synchronized to UTC and the time of capture was recorded in the Exchangeable Image File (EXIF) header of each image. Image files were named according to the time they were captured. The image filenames have the format yyyy_mmdd_hhmmssd.jpg. (For example, image 2008_0909_133636d.jpg was taken September 09, 2008, 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. Google Earth can be used to view selected images taken during the flight based on their time of capture compared to the recorded position of the aircraft at that time in the GPS record.

Processed Navigation

The processed navigation file can be accessed from within the nav folder or by clicking the following link: ds991_08ACH05.csv (CSV file). The file contains 12 fields that are defined as follows:

Field 1: LONGITUDE - estimated longitude (decimal degree, position of aircraft)
Field 2: LATITUDE - estimated latitude (decimal degree, position of aircraft)
Field 3: HR_MIN_SEC - hour_minute_second (UTC)
Field 4: IMAGE - image filename (yyyy_mmdd_hhmmssd.jpg)
Field 5: IMAGE_URL - location of the image internal to data series
Field 6: CONTACTSHEET_URL - location of the contact sheet within the data series report
Field 7: YEAR - year the photo was taken
Field 8: MONTH - month the photo was taken
Field 9: DAY - day the photo was taken
Field 10: PRE_POST - type of survey conducted (pre- or post-storm)
Field 11: STORM - (baseline or name of the storm)
Field 12: GEO_AREA - locations surveyed

Raw Navigation

The raw navigation files can be accessed from within the nav folder or by clicking the following link: ds991_08ACH05_0909_gpsmap60c.txt (text file). The file contains six fields (separated by spaces) that are defined as follows:

Field 1: HEADER - "T"
Field 2: TIME - Date and Time (m/d/yyyy hh:mm:ss )
Field 3: POSITION - latitude (N [North] degrees, decimal minutes), longitude (W [West] degrees, decimal minutes) position of aircraft
Field 4: ALTITUDE (meters)
Field 5: NAME - Leg Distance (feet)
Field 6: DESCRIPTION (desc) - Name of log entry


Home | Abbreviations | Contents | Photos and Maps | Navigation Data | Logs | Metadata | Citation Page

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