WIVIS System Advantages

OSi, formerly known as Scientific Technology, Inc. (ScTI), is the inventor and provider of the

Automated Surface Observing System (ASOS) present weather sensor, the LEDWI (Light

Emitting Diode Weather Identifier). By adding an off-axis receiver for visibility measurement, and

combining both the optical signal and the acoustic signal, reliable detection and discrimination of

ice particles can be achieved. The resultant instrument, WIVIS (weather identifier and visibility)

sensor, has been providing reliable measurements of visibility and present weather for many

years.