WMOD00303 ‎(2)‎

• Title: CRADP Operations Plan - 1985-86 Winter
• Date: 11/1/1985
• Weather Modification - Doc Type: Report

suspected that subsidence and associated evaporation of
cloud droplets reduces the SLW measured over the site as
compared with SLW present to a few kilometers upwind. A
purpose of the scanning observations will be to provide
a basis to estimate the importance of this suspected
phenomenon. If found important, interpretations of pre-
vious SLW observations from the Island Lake site may
have markedly underestimated the SLW production in
northwest flow storm periods.

The microwave radiometer will be calibrated at approxi-
mately weekly intE!l"vals by the "tipping curve" method.
This method provides updates of some of the coefficients
used in the computer software that can change due to
gradual shifts in atmospheric characteristics and
electronic component drift. Tipping curves can only be
made in cloud-free or totally ice-cloud conditions.

B. Automatic Weather Stations

Automatic weather stations known as PROBE (tortable
E,emote OBservations of the f,nvironment) will be deployed
at several sites dIround the ~sa (see Figure 2) to
record a variety of observations. They will provide 5-
minute averages which are stored and then transmitted
once per hour by satell ite rel ay to the Denver Federal
Center. The data can then be accessed by phone line at

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