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File:2017-06-06 10 45 14 Present weather sensor on the Automated Surface Observing System (ASOS) at Ronald Reagan Washington National Airport in Arlington County, Virginia.jpg - Wikimedia Commons
![File:2017-12-23 10 50 01 Visibility sensor on the Automated Surface Observing System (ASOS) at Washington Dulles International Airport in Chantilly, Fairfax County, Virginia.jpg - Wikimedia Commons File:2017-12-23 10 50 01 Visibility sensor on the Automated Surface Observing System (ASOS) at Washington Dulles International Airport in Chantilly, Fairfax County, Virginia.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/0/0a/2017-12-23_10_50_01_Visibility_sensor_on_the_Automated_Surface_Observing_System_%28ASOS%29_at_Washington_Dulles_International_Airport_in_Chantilly%2C_Fairfax_County%2C_Virginia.jpg)
File:2017-12-23 10 50 01 Visibility sensor on the Automated Surface Observing System (ASOS) at Washington Dulles International Airport in Chantilly, Fairfax County, Virginia.jpg - Wikimedia Commons
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