I've been fascinated by the concept and use of phase for a long time, really starting I think when I was introduced to the lockin amplifier as a graduate student. I knew about phase before that of course, but it was just then that I got a glimmer of how useful it could be. At its deepest levels phase is one of the characteristics of quantum mechanics that underlies our understanding of the physical world. But right now I want to explore its measurement in electromagnetic radiation, and in particular HF radio waves.

I'll use my Flex5000 radio as the detector and the NIST standard broadcast station WWV located near Boulder, Colorado, which broadcasts on 2.5, 5, 10, 15 and 20 MHz as the source to be measured.

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