Re: deja vu
The windblown stuff does accumulate though. The last south pole base was abandoned because the snow on top got too deep.
OTOH, if these reflectors are stuck on poles drilled in suitably deeply, then in the longer term they can be used to quantify ice movement as well as providing short term reference points.
I'd send out a team of penguins to do it, but at the 88th meridian they'd be even more lost than the polar bears.