ROA Time is the official time of

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

. It is established by ROA, the Royal Institute and Observatory of the ''Armada'' (Armada being the name of the

Spanish Navy The Spanish Navy or officially, the Armada, is the maritime branch of the Spanish Armed Forces and one of the oldest active naval forces in the world. The Spanish Navy was responsible for a number of major historic achievements in navigation, ...

in Spanish), at

San Fernando San Fernando may refer to: People *Ferdinand III of Castile (c. 1200–1252), called ''San Fernando'' (Spanish) or ''Saint Ferdinand'', King of Castile, León, and Galicia Places Argentina *San Fernando de la Buena Vista, city of Greater Buenos ...

Cádiz Cádiz (, , ) is a city and port in southwestern Spain. It is the capital of the Province of Cádiz, one of eight that make up the autonomous community of Andalusia. Cádiz, one of the oldest continuously inhabited cities in Western Europe, ...

Broadcasting methods

ROA broadcasts the official time in Spain using the following methods: # Transmission of

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, a ...

s 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 In radio, longwave, long wave or long-wave, and commonly abbreviated LW, refers to parts of the radio spectrum with wavelengths longer than what was originally called the medium-wave broadcasting band. The term is historic, dating from the e ...

station broadcasting time signals such as

DCF77 DCF77 is a German longwave time signal and standard-frequency radio station. It started service as a standard-frequency station on 1 January 1959. In June 1973 date and time information was added. Its primary and backup transmitter are located ...

from

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

or MSF60 (also known as NPL) from the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the European mainland, continental mainland. It comprises England, Scotlan ...

. # 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), 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. 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 (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