WWV transmits standard frequencies on 2.5 5, 10, 15, 20, and, experimentally, 25 MHz, derived from an ensemble of ceslium-beam stabilized clocks. Doppler shifts of the skywave results in received frequency error of up to 1 Hz or more, or…
The mechanical television era, dating from the early 1920s, used mechanical scanning technologies (discs, lenses and mirrors) to rasterize the subject with resolution from 30 lines, 12.5 frames per second, ultimately to 240 lines, 50 progressive frames per second by…
New at W6BM, time-stamped logging hardware/software has allowed a rich data set to be gathered of the reception phase of WWVB at 60 kHz. By logging the time shift of the WWVB carrier over several days, interesting artifacts become visible. …