Description
Calculates the theoretical fall rate of a dropsonde at any point in the sounding.
Formula
Dropsonde fall rate \(v\) is calculated from pressure \(p\) (mb), temperature \(t\) (C), sonde mass \(m\) (g), parachute area \(a\) (cm2), and parachute coefficient of drag \(C_d\):
\(v = \sqrt{\frac{2\times (\frac{m}{1000})\times 9.8}{\rho \times C_d \times (\frac{a}{10000})}}\\\)
where:
\(\rho = \frac{p \times 100.0}{287.0 \times (t + 273.15)}\)
Source
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