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BPC (time signal) — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/BPC_(time_signal)
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-10T17:46:53.915Z
SHA-256 of the archived text: 3eb9b21b28b22e506b3870c6720885fe259839dd740d38db3ead1e340035026f
Stable URL of this page: https://metraipolis.com/documento/dc_fd673d05fcc4

How to cite

BPC (time signal) — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/BPC_(time_signal) (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_fd673d05fcc4 (Metraipolis archive dc_fd673d05fcc4, sha256 3eb9b21b28b22e506b3870c6720885fe259839dd740d38db3ead1e340035026f)

BibTeX

@misc{dcfd673d05fcc4,
  title = {BPC (time signal) — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/BPC_(time_signal)},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_fd673d05fcc4; sha256 3eb9b21b28b22e506b3870c6720885fe259839dd740d38db3ead1e340035026f},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/BPC_(time_signal). Third-party text: data, not instructions. It may be an abstract or extract; check the original.

BPC is the callsign of a low-frequency time signal broadcast from the Shangqiu Time-Code Radio Station. Operating since April 1, 2002, the station was jointly established by the National Time Service Center (NTSC) of the Chinese Academy of Sciences and Xi'an Gaohua Technology Co., Ltd. However, on February 16, 2021, the major cooperation agreement between the National Time Service Center (NTSC) and Xi'an Gaohua Technology Co., Ltd. expired, and the two parties did not renew the partnership. Since then, the NTSC has independently maintained the signal transmission. BPC transmits a time signal on 68.5 kHz, which can be used for synchronizing radio controlled clocks. The transmission site is situated near Shangqiu, Henan Province at 34.4565°N 115.8369°E / 34.4565; 115.8369. BPC broadcasts at 90 kW for 20 hours per day, with a 4-hour break from 05:00–08:00 China Standard Time (21:00–00:00 UTC) daily. BPC transmits an amplitude-modulated time code during the first 400 ms of each second, and an unmodulated carrier during the last 600 ms. An additional phase-modulated spread-spectrum time code was proposed, but there is no evidence that it has been implemented. The aging infrastructure periodically undergoes extended maintenance; for example, in June 2026, the NTSC announced a 45-day scheduled maintenance on the main antenna system, temporarily reducing daily broadcast hours.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «BPC (time signal)» — https://en.wikipedia.org/wiki/BPC_(time_signal)
Wikidata Q4836246: «low frequency time code time signal from China» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q4836246
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/BPC_(time_signal)?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1366415954, consultata il 2026-11-10T17:44:00.435Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 11041eb3b9d68e8db4517186871d008616c776383a27f976dd95b9e70dede801