Here's an exposition of the astronomical instrument, if anyone is curious: https://arxiv.org/abs/1812.07403 https://arxiv.org/abs/1812.07403 ("The upGREAT dual

Here's an exposition of the astronomical instrument, if anyone is curious: https://arxiv.org/abs/1812.07403 https://arxiv.org/abs/1812.07403 ("The upGREAT dual frequency heterodyne arrays for SOFIA" [2018])