WMOD00306

• Project Name: Sierra Cooperative Pilot Project
• Title: Sierra Cooperative Pilot Project - Operations Plan - 1986-1987
• Date: 10/1/1986
• Weather Modification - Doc Type: Report

(Velox) was applied last year and found to be most effective in preventing
contamination of the dish. A small fan will be deployed to keep dry snow off
the reflector.

The radiometer will be monitored by Bureau personnel from 0600 to 1800 local
time and by a Bureau contractor between 1800 to 0600 local time, as required
by the Site Director.

The objectives of the 1986-87 radiometer operations will be as follows:
a. Provide real-time indication of supercooled liquid water to the Site
Director for use in planning seeding operations.
b. Develop a climatology on the existence of supercooled liquid water in
relation to the predominant synoptic environment.
c. Verify the measurement of supercooled liquid water and water vapor
through intercomparison with other devices as applies (i .e. aircraft, ice
detectors, rawinsondes).

The radiometer will operate in the fixed zenith mode. Air temperature, humi-
dity, vapor and liquid will be made available to the forecast office via a
telephone link to the Handar 540 data collection platform. Coincidentally,
the data will be transmitted through the GOES satellite and received through
the Perkin-Elmer downlink in Denver, Colorado.

3. Ground-based Microphysics Observations
The Bureau's ground-based microphysics laboratory will be utilized again this
season to obtain high resolution meteorological and snow crystal measurements.
Data wi 11 be taken by Bureau personnel from November 3, 1986, to January 9,
1987. Observations will be made at Kingvale, California during periods when
the effects of aircraft seeding are targeted to Kingvale. Observations will
begin 1 hour prior to the arrival of seeded precipitation and continue for

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