Take a moment to tune in at every 8 after the hour on WWV and 48 after the hour on WWVH transmitters. WWV, WWVH stations, HamSCI and NIST and investigating HF propagation.

The Characterization Signal will consist of a 45 second WAV file on minute 8 for WWV and minute 48 for WWVH.  Right now it is planned as a standard voice announcement, inserted into the broadcast chain as an audio file. 

This is an incredibly exciting opportunity for collaboration between Amateur Radio and the federal government’s lead physical science laboratory, NIST, and harkens back 100 years to the Fading Experiments coordinated between the then NBS and an early ARRL.

A full description of the Characterization Signal and audio files are available at https://zenodo.org/record/5182323

Updates on the efforts will be posted here at WWV ARC and also at the HamSCI website: https://hamsci.org/wwv  

WWV Frequencies [ MHz ]: 2.5; 5.0; 10.0; 15.0; 20.0 from Fort Collins, Colorado

WWVH Frequency: 2.5 MHz from Kauai, Hawaii



HamSCI: https://hamsci.org

WWV: https://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwv

WWVH: https://tf.nist.gov/stations/wwvh.htm

History of WWV: https://www.nist.gov/time-distribution/radio-station-wwv/history-radio-station-wwv