 
We're out here trying to measure the
sea ice thickness with the OhmMapper
resistivity survey.
So basically resistivity is a measure
a material's ability
to resist the flow of electricity. And the OhmMapper
has a bunch of components on it that provide that electrical signal and some
receivers,
and that can give us the cross-section I
what's happening in the subsurface
We've got our operator at the front, and he's holding kind of the brain of
the OhmMapper which gathers up all the
data, and at the very back
we've got the transmitter, the
transmitter sends out a signal
an electrical impulse into the
subsurface and each of the receivers
that you see behind me
receives the signal from a different depth
and once we gather that information
that that depth shows up like lines as we
move this thing behind the operator.
And so then if
when we get to the end of our survey
line and turn around
we lengthen the rope just a little bit
so that we get
the space in between those lines and we
fill in that information with more data,
and we come back along the same line so that
gives us
anywhere from 6 to 10 data points which
as we move become lines
and no things are transmitted again from
the back, those electrical signals, we can
change the length
of the rope to look a little deeper or a
little bit more shallow.
 
