排列5历史开奖号码
短波授時臺 >>

  BPM每天24小時以2。5,5,10,15MHz四種載頻交替發播標準時間頻率信號,覆蓋全國,授時精度為毫秒量級。協調時UTC和世界時UT1 的標準時號用1KHz標準音頻調制載頻產生,秒信號長度分別為10ms(UTC)和100(UT1),整分信號均為300ms 。

[發射機組大廳]

BPM broadcasts the standar time and frequency signals at 2.5 , 5 , 10 ,15 MHz alternatively 24 hours a day , which cover the whole country with the precision of 1 ms .Signals of UTC and UT1 are modulated by 1 KHz standard frequency.The lengths of the second signals are 10 ms (UTC) and 100 ms () , and the length of minute signal is 300 ms .BPM will disseminate the standard time code after a technical reconstruction. [BPM授時臺]

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                                                                                                     [短波接收認證卡]——2004年1月1日啟用

什么是無線電信號收信確認卡(QSL卡)?

如何獲得國家授時中心BPM短波時號認證卡?

 

排列5历史开奖号码