DF4_9460 The BPC station in Shangqiu, Henan, is a low-frequency time signal broadcast station used for public radio receivers. The location of the BPL central station is generally referred to as Xi'an Lintong (the location of the National Time Signal Center of the Chinese Academy of Sciences), but many facilities are actually located in Pucheng, Weinan (which is similar to the Jiuquan Satellite Launch Center, actually located in Ordos, Inner Mongolia). I don't know if other remote stations within this system also use the BPL call sign.
You can purchase the radio frequency module used with BPC on Taobao, and there are also many good articles online explaining the encoding and decoding principles. It is easy to implement using an SDR or DSP.
It appears that domestically produced Loran-C receivers using BPL technology are not publicly sold, but can be found as major suppliers in some bidding documents. Used receivers can also be purchased on websites like eBay for a reasonable price. The decoding algorithm is public, but it is complex. You can find some Chinese and English materials by searching for "Loran-C receiver," but building one yourself likely has significant barriers.
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