Time pips, announcement, and full ID by man giving 2.5, 5, 10, 15, 20 MHz frequencies. 25 MHz was not mentioned but this broadcast was on 25 MHz. At 2108 GMT, a test signal was broadcast to assist in ionospheric research, consisting of various tones, chirps, and Gaussian noise bursts. WWV and WWVH started broadcasting the test signal on November 15, 2021.
Time pips, announcement, and full ID by man giving 2.5, 5, 10, 15, 20 MHz frequencies. 25 MHz was not mentioned but this broadcast was on 25 MHz. Then 2108 GMT cut of a test signal used to assist in ionospheric research, consisting of various tones, chirps, and Gaussian noise bursts. WWV and WWVH started broadcasting the test signal on November 15, 2021.