Masers, which are like lasers that operate in the microwave spectral range, can reliably keep time but have limited accuracy. "The stability of the masers ...

This material, with 17 times lower intrinsic birefringence than lithium niobate, combines advanced microwave and optical ...

Of these, 29 events were "predicted" on the basis of progressive hardening for a hit rate of 71%. The 152 largest flares had a hit rate of "predicting" proton events of 82%. Microwaves comprise one ...