3. Align the unwinder so that it points directly downwards from the balloon neck, as
illustrated in the figure below.
To ensure a successful sounding, align the unwinder so that it points
downwards from the balloon neck.
CAUTION!
3.5 Preparing the Radiosonde with
Ground Check Device RI41
In the sounding preparations, RI41 is connected to the sounding software computer via a
USB cable and operated with the help of the sounding software. RI41 is switched on by
connecting it to the sounding system and turning on the computer.
For information on configuring RI41 as the ground check option in the sounding software,
see the MW41 on-line help. The on-line help also provides information on other options for
preparing the radiosonde for the sounding.
Chapter 3 – Operation
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