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Left: ASOS Sensor
Group: Sunrise
in Salinas, CA (SNS)

Right: ASOS on NWS Headquarters roof
in Silver Spring, MD

ASOS Basics and Resources

ASOS Technical Info

What is ASOS?
What Does ASOS do?

ASOS User's Guide
Change for Ice Pellets 
User's Guide Appendices
If you have trouble viewing Table 4, and Figures 1, 18-19, see 
ASOS Charts

ASOS Sites (FAA)
ASOS Tech News Page
(restricted site)
Surface Weather Information/ASOS

Trainer's Tool Kit

ASOS Test Systems
ASOS Product Improvements:
Policy Directive
Computing Magnetic Wind Direction

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Silver Spring, MD 20910
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