It is presently possible to obtain multi-octave bandwidth from a single coupler which employs several cascaded quarter-wavelength sections of uniformly-coupled line. A comprehensive bibliography ...

Blue Ghost deployed four tethered Lunar Magnetotelluric Sounder (LMS) electrodes at 90-degree angles to each other onto the lunar surface, shot far from the lander's top deck.

Heat persists even at night, with temperatures in some places not dipping much below 90 degrees. There is little respite. Air conditioning is very rare in European homes.