Hd2ioa

HD2IOA is the callsign of a time signal radio station operated by the Navy of Ecuador.^[1] The station is located at Guayaquil, Ecuador and transmits in the HF band on 3810 and 7600 kHz.^[2]

The transmission is in AM mode with only the lower sideband (part of the time H3E and the rest H2B/H2D) and consists of 780 Hz tone pulses repeated every ten seconds and voice announcements in Spanish.

While sometimes this station is described as defunct, reception reports of this station on 3810 kHz appear regularly at the Utility DX Forum.^[3]

Notes and references [link]

^ Instituto Oceanográfico de la Armada, Casilla 5940, Guayaquil, Ecuador
^ Gerd Klawitter (1980). List of Time Signal Stations (9th Edition). pp. 22.
^ Recently, logs of HD2IOA appeared at the UDXF in March 2008.

Ecuador portal

v t e Time signal stations

Longwave	BPC DCF77 JJY RBU RJH66 Time from NPL (MSF) TDF WWVB

Shortwave	BPM CHU HD2IOA HLA RWM WWV WWVH (Hawaii, USA) YVTO

Satellite	GPS Beidou Galileo GLONASS IRNSS

Defunct	HBG OMA OLB5 VNG Y3S

Time

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Calendar	Day Week Month Year Tropical year Gregorian Islamic Julian Intercalation Leap second Leap year

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v t e Time measurement and standards

Major subjects	Time Chronometry Orders of magnitude Metrology

International standards	UTC UTC offset UT ΔT DUT1 IERS ISO 31-1 ISO 8601 TAI 12-hour clock 24-hour clock Barycentric Coordinate Time Civil time Daylight saving time Geocentric Coordinate Time International Date Line Leap second Solar time Terrestrial Time Time zone

Obsolete standards	Barycentric Dynamical Time Ephemeris time Greenwich Mean Time Prime Meridian

Time in physics	Absolute time and space Spacetime Chronon Continuous time Coordinate time Cosmological decade Discrete time Planck epoch Planck time Proper time Theory of relativity Time dilation Gravitational time dilation Time domain T-symmetry

Horology	Clock Astrarium Atomic clock Complication Equation of time History of timekeeping devices Hourglass Marine chronometer Marine sandglass Radio clock Sundial Watch Water clock

Calendar	Astronomical Dominical letter Epact Equinox Gregorian Hebrew Intercalation Islamic Julian Leap year Lunar Lunisolar Seven-day week Solar Solstice Tropical year Weekday determination Weekday names

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Related topics	Chronology Duration Mental chronometry Metric time System time Time value of money Timekeeper

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