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

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

Where to Start

Software Updates

Where Else to Go

What is ASOS?
What Does ASOS do?

ASOS User's Guide, 3/98
Change for Ice Pellets, 10/98 
User's Guide Appendices
, 3/98.
If you have trouble viewing Table 4, and Figures 1, 18-19, see 
ASOS Charts
To read these PDF files, you need Adobe Reader

Dew Point Temperature Sensor
All-Weather Precipitation Accumulation Gauge History of ASOS Growth

ASOS Product Improvements:
Policy Directive

ASOS Tech News Page
(restricted site)
Freezing Drizzle Algorithm Dev
ASOS data via FTP
Ice Accretion Algorithm Dev
Computing Magnetic Wind Direction ASOS Station Information

Trainer's Tool Kit

US, International Code Change For Ice Pellets
ASOS Test Systems
  Blowing Snow (BLSN) Algorithm

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1325 East West Highway
Silver Spring, MD 20910
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