ramsonde

ramsonde

[′ram‚sänd]
(engineering)
A cone-tipped metal rod or tube that is driven downward into snow to measure its hardness. Also known as ram penetrometer.
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Snow depth and hardness were recorded at each plot using a Ramsonde penetrometer.
where h is the mass of the load (g), hd is the height of the hammer drop (cm), hd is the number of hammer drops, d is the penetration into the snow cover (cm), and Q is the total mass of the Ramsonde.