BPL is the call sign of the official long-wave

time signal A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day. Church bells or voices announcing hours of prayer gave way to automatically operated chimes on public clocks; however, au ...

service of the

People's Republic of China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

, operated by the

Chinese Academy of Sciences The Chinese Academy of Sciences (CAS; ) is the national academy for natural sciences and the highest consultancy for science and technology of the People's Republic of China. It is the world's largest research organization, with 106 research i ...

, broadcasting on 100 kHz from CAS's

National Time Service Center The National Time Service Center (NTSC; ) has the task of generating, maintaining and broadcasting standard time in China. It is located in Xi'an, Shaanxi, China. Its predecessor was the Shaanxi Astronomy Observatory of the Chinese Academy of Scie ...

Pucheng County, Shaanxi Pucheng County () is a county in the east of Shaanxi province, China. It is under the administration of the prefecture-level city of Weinan. The county spans an area of , and has a total population of 761,776 as of 2022. Toponymy According to th ...

at , roughly 70 km northeast of

Lintong Lintong District (), formerly Lintong County, is one of 11 urban districts of the prefecture-level city of Xi'an, the capital of Shaanxi Province, Northwest China. The district was approved to establish from the former ''Lintong County'' () by t ...

, along with NTSC's short-wave time signal BPM on 2.5, 5.0, 10.0, and 15.0

MHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose formal expression in terms of SI base u ...

. BPL broadcasts LORAN-C compatible format signal from 5:30 to 13:30 UTC, using an 800 kW transmitter covering a radius up to 3,000 km.

References

External links

长波授时 (Longwave time signal)
from the National Time Service Center, Chinese Academy of Sciences {{China-stub Time signal radio stations