Editing Beta (time signal) (section)

{{Short description|Time signal radio station in Russia}}
'''Beta''' is a [[time signal service]] in the [[Very low frequency|VLF]] range in [[Russia]], operated by the [[Russian Navy]].<ref name="c3systems">[http://www.astrosol.ch/networksofthecisforces/vlfmorsedigmodenetwork/5379039f1707a4601/index.html C3 Systems of the CIS Navy] {{webarchive |url=https://web.archive.org/web/20111005174016/http://www.astrosol.ch/networksofthecisforces/vlfmorsedigmodenetwork/5379039f1707a4601/index.html |date=October 5, 2011 }}</ref> It is controlled by [[All-Russian Scientific Research Institute for Physical-Engineering and Radiotechnical Metrology]].<ref name="vniiftri">{{Cite FTP |url=ftp://ftp.vniiftri.ru/BULLETINS/V/BulV_16_2018.pdf|lang=ru|format=PDF|script-title=ru:Эталонные сигналы частоты и времени|server=FTP server|url-status=dead|trans-title=Standard Time and Frequency Signals|access-date=2020-05-10}}. Official signal specification.</ref> There are 6 transmitter stations, which take turns transmitting time signals and other communications.

Each transmitter has 1 or 2 scheduled sessions per day lasting 31–41 minutes, depending on transmitter, total 8 sessions in 24 hours. Beginning on the hour is 15–20 minutes of 25.0 kHz, including [[morse code]] station identification and time code.  This is followed by 3- or 4-minute intervals of 25.1, 25.5, 23.0 and 20.5 kHz of unmodulated carrier precisely phase-locked to UTC(SU) time scale.  No time code is sent during the last quarter of an hour.<ref name="vniiftri"/>