Optical interferometry at CHARA requires collecting the light beams from six different telescopes, sifting through
multiple gigabytes of data, and then combining the beams to synthesize the kind of image that otherwise would be possible only with an enormous space telescope.
They are not full - scope Bitcoin clients, because they can not download
multiple Gigabytes of Blockchain
data (well, technically they can but your
data bill would be huge, and all
of the storage space on your smartphone would be taken up with the contents
of the Blockchain, which is always growing).