ROA Time is the official time of
Spain. It is established by ROA, the
Royal Institute and Observatory of the ''Armada'' (Armada being the name of the
Spanish Navy in Spanish), at
San Fernando,
Cádiz.
Broadcasting methods
ROA broadcasts the official time in Spain using the following methods:
# Transmission of
time signals in
HF in two daily intervals of 25 minutes. From 10:00 UTC to 10:25 UTC on 15.006 MHz and from 10:30 UTC to 10:55 UTC on 4.998 MHz. The station is a Harris RF-130 with 1kW of power broadcasting from San Fernando (Cádiz). This is the only radio broadcast of official time in Spain as there is no
longwave station broadcasting time signals such as
DCF77 from
Germany or
MSF60 (also known as
NPL) from the
United Kingdom.
# Via hotline (Phone number: +34 956 59 94 29), using a time information broadcasting protocol widely used in Europe (European Telephone Code Standard). Access is limited to two minutes per call and admits international calls.
# NTP Protocol (
Network Time Protocol
The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable- latency data networks. In operation since before 1985, NTP is one of the oldest Internet protocols in c ...
), through two Internet servers placed in San Fernando and a third one placed in Madrid (NTP Servers: hora.roa.es and minuto.roa.es, both available through ntp.roa.es).
#
Timestamping
A timestamp is a sequence of characters or encoded information identifying when a certain event occurred, usually giving date and time of day, sometimes accurate to a small fraction of a second. Timestamps do not have to be based on some absolut ...
. The ROA, as a TSA (Time Stamping Authority), provides a timestamping server for official certifications through a standard digital certificate x509 v3. This system is used by the whole public administration in Spain for timestamping their transactions. This service is available through the
SARA Network
Sara may refer to:
Arts, media and entertainment Film and television
* ''Sara'' (1992 film), 1992 Iranian film by Dariush Merhjui
* ''Sara'' (1997 film), 1997 Polish film starring Bogusław Linda
* ''Sara'' (2010 film), 2010 Sri Lankan Sinhal ...
(Sistema de Aplicaciones y Redes para las Administraciones).
References
External links
Real Observatorio de la Armada - Time Real Instituto y Observatorio de la Armada (Royal Institute and Observatory of the Spanish Navy)
ROA official time
Time in Spain
Spanish Navy
{{Time signal authorities