With a 2gb RS-MMC card I'm sure there's enough space, but with the
225MHz cpu
patience would be required.
On a 20$ box things might need to look much more like they did back
when people were self-hosting development systems with sub-5 MHz cpus
-- but from the patience standpoint, that might be a feature.
Maybe stick a spike into the ground and throw out various frequencies
to do
area effect detection of metals, caves, water table, fault lines...
As far as I can tell, your energies are going to be far too weak to see
much. Serious exploration work involves blowing stuff up, and only
where the neighbors complain too loudly have they recently been forced
to switch to less explosive techniques:
http://www.ut.blm.gov/stonecabin/seismicscience.htm
http://www.glossary.oilfield.slb.com/DisplayImage.cfm?ID=285
On the other hand, instruments are getting pretty sensitive. There is
a story about an incident in Los Angeles where the local newspaper
called for "information about this morning's quake", only to be told by
a sleepy grad student that, far from having a nice solution for the
epicenter, it seemed to be
a) at negative depth
b) moving rapidly, and
c) had probably been heading for Edwards AFB.
(Pakistan turned off all their seismometers during their nuke tests.
Of course, everyone else could still see the reflections, but maybe
they could've suppressed some weak signals)
FPGAs are good for reconfigurable hardware, but does that exist for
antennas?
There is such a thing as a Dicke switch, which very rapidly switches
between two antennas, or an antenna and a null load. I'd imagine
everything needs to be tuned and matched, but maybe you could rig up a
design so that it would be possible to switch in and out different
elements to reconfigure the geometry. If you can do the signal
processing, it may be easier to use a fixed h/w array for the raw data,
then synthesize a virtual antenna in post.
-Dave
