NTPv4 Specification Update
In his 2004 brief NTPv4 Specification Update, David L. Mills outlines the differences between the NTPv3 and NTPv4 specifications and the new features provided by NTPv4.
In his 2004 class assignment entitled WWV/H Demodulator and Decoder, David L. Mills provides the architecture and supported formats for creating an optimum demodulator and decoder for the WWV and WWVH shortwave broadcasts from Colorado and Hawaii.