Fwd: Re: SOWACS: CS616 probe linearity?

[Arie Nadler]

Arie Nadler writes to the sowacs list:
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Dear Bruce,
Dr. J. Bilskie has beautifully and accurately expressed the dependency of
the CS616 pulse attenuation on the different causes (OMC, BD, EC, %Clay)
which determine the its degree.
On the other hand, I would expect him to support his observation ("My
observations show that the CS616 is a time domain device") by data.

But the last sentence of his letter worries me most.
If I am not mistaken, the EM pulse rise time is the primary factor in
determining the accuracy of the Ka measurements.
If the risetime of the CS616 is a couple (2?-5?) of nanoseconds than it is
at least
AN ORDER OF MAGNITUDE
longer (and therefore less curate) compared to the TEK1502 or the TDR-100
(which is basically based on the 1502).

Arie Nadler
Dept. of Soil Physics
Institute of Soil, Water, and the Environment
A.R.O., Volcani Center, Min. of Agriculture
POB 6 Bet Dagan, Israel, 50250
Tel: 972-3-9683865
Fax: 972-3-9604017
Home: 972-8-9404161
Email: vwnad@volcani.agri.gov.il

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