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- 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 at 34°27′25″N 115°50′13″E / 34.457°N 115.837°E. BPC broadcasts at 90 kW for 20 hours per day, with a 4-hour break from 05:00–09:00 (China Standard Time) daily (21:00–1:00 UTC). BPC includes both conventional amplitude modulated time code and additional spread-spectrum time code, about which little is known. (en)
- 商丘低频时码发播台是一个位于中国河南省商丘市虞城县的时码发播台，呼號BPC。该发播台由中国科学院国家授时中心和西安高华科技有限公司在2002年4月25日设立。该站以68.5 kHz長波無線電频率发送时间信号，可被电波钟表接收供校时之用。与其他授时台不同的是，该站并不公开其信号格式，使用者需要获得许可才能使用其信号。该站每天以90kW的功率播发20小时，其余4个小时（北京时间 5:00–9:00）停机检修。该站传送的信号既包括普通的调幅时码，也包括附加的扩频时码。 2021年2月16日，国家授时中心与西安高华科技有限公司签订的主要合作协议到期，双方不再继续签约合作。商丘台低频时码信号发播工作由国家授时中心继续维持。 (zh)
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- 商丘低频时码发播台是一个位于中国河南省商丘市虞城县的时码发播台，呼號BPC。该发播台由中国科学院国家授时中心和西安高华科技有限公司在2002年4月25日设立。该站以68.5 kHz長波無線電频率发送时间信号，可被电波钟表接收供校时之用。与其他授时台不同的是，该站并不公开其信号格式，使用者需要获得许可才能使用其信号。该站每天以90kW的功率播发20小时，其余4个小时（北京时间 5:00–9:00）停机检修。该站传送的信号既包括普通的调幅时码，也包括附加的扩频时码。 2021年2月16日，国家授时中心与西安高华科技有限公司签订的主要合作协议到期，双方不再继续签约合作。商丘台低频时码信号发播工作由国家授时中心继续维持。 (zh)
- 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 broadcasts at 90 kW for 20 hours per day, with a 4-hour break from 05:00–09:00 (China Standard Time) daily (21:00–1:00 UTC). BPC includes both conventional amplitude modulated time code and additional spread-spectrum time code, about which little is known. (en)
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- BPC (time signal) (en)
- 商丘低频时码发播台 (zh)
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