BPC (time signal)
BPC is the callsign of a time signal broadcasting from the BPC Shangqiu Low-Frequency Time-Code Radio Station, cooperatively constructed by the National Time Service Center of the Chinese Academy of Sciences and Xi’an Gaohua Technology Co., Ltd.[1], since April 25, 2002.
BPC transmits a time signal on 68.5 kHz, which can be used for synchronizing radio controlled clocks. As opposed to other time signal transmitters, the signal format is not published openly; a special license is required. The transmission site is situated near Shangqiu, Henan Province[1] at Lua error in package.lua at line 80: module 'strict' not found..[2]
BPC broadcasts at 90 kW for 21 hours per day, with a 3 hour break from 05:00–08:00 (China Standard Time) daily[2] (21:00–24:00 UTC). BPC includes both conventional amplitude modulated time code and additional spread-spectrum time code, about which little is known.[3]
References
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- 低频时码授时, from the National Time Service Center, Chinese Academy of Sciences
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 http://www.time.ac.cn/serve/e_c.htm
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
