"The National Frequency Agency (ANFR) was commissioned by the Government to
maintain the broadcast of the hourly signal after France Inter longwave closes
down at the end of December. This service is widely used in key sectors of the
French industry to synchronize more than 200,000 clocks.
Since 1977, the frequency of France Inter also transmits a reference time
signal elaborated from atomic clocks. This signal is inaudible but, when it is
picked up by an appropriate apparatus, it provides French legal time. Some
public service undertakings, such as SNCF, Enedis or Aéroports de Paris, but
also local authorities, use this signal to synchronize clocks in public places,
information panels, Public lighting or the synchronization of pay and display
machines.
This radio-synchronization service on the 162 kHz frequency provides a time
reference of very high accuracy and reliability. It has the advantage of being
better received in indoor spaces than other time bases, such as GPS or mobile
phone networks.
The Government wished to maintain the broadcasting of these hourly signals
after the termination of France Inter's programs. In this context, it has
tasked the National Frequency Agency (ANFR) to organize the maintenance of this
broadcast as from 1 January 2017.
kkx
ANFR, in close collaboration with TDF, the CFHM (French Chamber of Watchmaking
and Microtechnology), and the main users of the signal, will carry out tests
from the beginning of 2017 to adjust the parameters for broadcasting the time
signal."
You don't need such high power to transmit a time signal to France.
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