[time-nuts] GPS through windows

[Mark Sims]

You can buy windows (or coverings) designed to block RF.   The most common version blocks cell freqs/wifi/etc.   Generally used with a matching wall covering to keep your secret sauce from getting out.  

While you're at it,  add the window vibrator to give the laser microphones an earful.  And toilet vibrators so your crappers don't spill secrets into the water column.