Files:

Digital_Elevation_Models.zip
  Size: 23560002 bytes (22 MiB)
  SHA256: 1FF42120F106D0761E9F547A58CB8EABF76CCDBB8E993C085B5EE7BBA4D2CA4A

  DEMs of areas (level and sloped surfaces) where data was collected. 


Ground_Control_Points.zip
  Size: 9842 bytes (9 KiB)
  SHA256: DBBD3B03F5C3E8ED74598C92FAFC8C0FD78D1F5CF80C60E41696DBB408BA79D3

  Shapefiles containing the GCPs for the study locations (Level, Slope,
  Prelim_Level).


Images_Level.zip
  Size: 3108611519 bytes (2964 MiB)
  SHA256: 4117EC6F456DAD38530F28856CF88CD7EA6B2F3D954706B3F7C5348B4D985136
Images_Slope.zip
  Size: 2565665116 bytes (2446 MiB)
  SHA256: 3AD980D6752C430BF7F2DFB1500CC6CABB47B10BA0C42A7E88D380F42F9F3DA1
Images_Prelim_Level.zip
  Size: 1203769928 bytes (1148 MiB)
  SHA256: 94EC2605C3B3DD13860F4ADDD96D534B19C034323409C6B6CE50090DC9FDDCFB

  JPGs of vertical aerial photographs taken by Camera Unoccupied Aircraft 
  System (UAS). 
  
  Image files are named "date_time_number.jpg" where date is year_month_day 
  and time is hour_minute_second.
  
  Files are grouped in subdirectories by condition. The subdirectories are
  named "surface_actual distance_target uas altitude". For example,
  Level_10m_45mAGL contains images from flights over the level surface where
  the actual horizontal distance between the two UAS was 10m and the Target
  UAS was hovering at 45m AGL.


Target_UAS_Appearances.zip
  Size: 29926 bytes (29 KiB)
  SHA256: 471D08065F2AD5E574B75F03A7714565B51DDE7619F02784C7F9761CDFB9B646

  Shapefiles of the Target UAS appearance locations in georeferenced images.
  The points are named for the image that was used to find the Target UAS
  position. 
  
  The shapefiles are grouped in subdirectories that use the same naming scheme 
  as the images.


Wind_Speeds.zip
  Size: 48050 bytes (46 KiB)
  SHA256: C6238E369D6B1D60646997B9364B0FF6D2B640B7DA068F63497DBA2EAAB2F10D

  Spreadsheets that contain the wind speeds experienced during flights.
  
  
Example_Calculations.zip
  Size: 108480 bytes (105 KiB)
  SHA256: 4F2432D7DEAA3289A89F11CB9AC82D820E3A24406D5D1E47566C4889A65E1088

  Predict_Appearance_Distance.xlsx
    Uses relief displacement formula to predict where an airborne object will
    appear in a vertical aerial photograph based on: 
      Actual horizontal distance from principal point to the airborne object
      Camera height
      Object height
    
  Calculate_Actual_Horizontal_Distance.xlsx
    Uses relief displacement formula to calculate the actual horizontal distance
    between an airborne object and the principal point of a vertical aerial 
    photograph based on: 
      Distance from principal point to airborne object appearance in the photo
      Camera height
      Object height