| Data Coverage Chart |  | 
    
    
    
        A data coverage chart is a diagram showing the presence or absence of valid data in each time step.
    
    
    
        The example above shows:
    
    
        - 
            the anemometers reporting frequent short outages, often the A or B anemometer, but rarely both at once (a pattern typical of tower shading)
        
- 
            an outage in the 'Direction 58m' variable in late November and early December of 2017
        
- 
            two brief outages in mid-May 2017 in all data columns except 'Air Density'
        
See also
    Data Coverage window
    
    
        Written by: Tom Lambert
Contact: windographer.support@ul.com
        Last modified: November 6, 2017