At 02:22 PM 10/5/2004, firmware@tds.net wrote:



>> 
>> >
>> >And, yes, there are "official" instruments that can measure this. The ones I've discovered use lasers and inferometery to measure the velocity as the object falls, they're WELL outside my budget.
>> 
>> 
>> Can you use 10 or 24 GHz doppler? 
>> 
>> 
>
>Possibly... Any idea of cost/complexity? 

Commercial doppler units are available for around $20-$50.
This gets you the head and an antenna, you need to feed it the 8VDC for the gunn diode, and pick off the output at the detector.
As long as the object is relatively close, and has some metallic or carbon, or water content, you should be able to see it.

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