Accurate Time Resources for Amateur Radio
Find essential time references, world clocks, and time zone converters for precise logging and scheduling in ham radio operations.
Accurate timekeeping is essential for amateur radio operators, especially for logging QSOs, participating in contests, and coordinating DX operations across different time zones. Understanding UTC (Coordinated Universal Time) is fundamental, as it serves as the global standard for amateur radio activity, helping hams worldwide synchronize their operations and avoid confusion with local daylight saving changes.
This category provides various tools and references to help operators manage time. You can find interactive world clocks to track multiple time zones simultaneously, along with resources explaining the relationship between UTC, GMT, and local times. There are also sunset and sunrise calculators, useful for planning antenna projects or predicting propagation on different bands, and information about time signal stations like WWV and WWVH, which provide precise frequency and time data for calibrating station clocks and understanding propagation conditions.
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A Few facts concerning GMT, UT, and the RGO -
Three local city times around the world displayed simultaneously. -
Real time world clock -
Standard time zone map of the world in a jpeg file -
A large printable PDF file representing the world time zones. This map gives an overview of current local times around the world. If you ever asked yourself what time zone am i in, find your answer here. -
dxing.com explains utc time and gmt conversions to local time -
Military time notation is based on 24-hour clock. A time of day is written in the form hhmm, where hh (0-23) stands for full hours that have passed since midnight, mm (00-59) is the number of minutes that have passed since the last full hour. To convert hours greater then 12 to 12-hour clock just subtract 12 from the given hours and that will give you the PM time -
Measuring the Frequency Accuracy and Stability of WWV and WWVH by Michael A. Lombardi. An examination of just how accurate these frequency standard stations are. -
This project taps into the NMEA stream and provides both a visual display with an LCD and also LED indicators and a sounder. The LCD outputs include 3D Lock, 2D Lock and NO Lock while the UTC time is also displayed to screen. -
As FT8, JT65 and JT9 are a time synchronized protocol, one soon discovers that an accurate PC clock is very important. If your workstation time is off it can cause you to send when no one is listening, or to listen when no one is sending. -
Before the advent of satellite communication, maritime communication adhered to an international protocol requiring ships and coastal stations to observe silent periods twice an hour, reserved specifically for emergencies. These silent periods were marked by red sectors on the 500 kHz frequency and green sectors on the 2182 kHz frequency. The 4-second red bars facilitated the manual transmission of the SOLAS distress signal. -
Display time around the workd just with a point and click -
SunCalc is a tool that displays the movement of the sun and sunlight phases for a specific day and location. Users can adjust the sun's positions for sunrise, selected time, and sunset. The visual representation includes a curve showing the sun's trajectory and variations throughout the year. The tool also provides information on sunlight distribution during the day. SunCalc is useful for hams wanting to plan outdoor activities based on sunlight availability and position. Users can support the website's maintenance with a donation via PayPal. -
VLF Time Signal Stations, Station List Compiled by William Hepburn, LWCA -
Fans of NIST signals cite benefits including understanding the near-Earth environment -
World Time Zone is an online quick reference chart that displays the world time zones in detail. DST is also indicated by yellow markers on the map. UTC difference is marked with different colors, and if you point and click will show up area details
