Radio Waves EclipsedĮclipseMob is a crowdsourced effort to gather radio wave measurements from across the U.S. In addition to being a good opportunity to celebrate, the total eclipse is also a good opportunity to do science. A total eclipse that will be seen from Oregon to South Carolina is, therefore, cause for celebration. Roughly two-thirds of Earth’s surface is covered by water, so naturally, most total eclipses pass over water rather than land, and even those that do pass over land often do so in places where few people live. A total solar eclipse is a relatively rare event, and the August 21 eclipse is even rarer in that it will pass over a highly populated land mass. You see, I am part of a team of researchers organizing the EclipseMob experiment, and WWVB is our key to understanding how the ionosphere changes during a solar eclipse-and what that means for radio communications.įor those of you who have been distancing yourselves from news and social media over the past several months, I have exciting news: A total solar eclipse will cross the United States on Monday, August 21. While atomic clocks are fascinating, and WWVB provides a vital service, I’m only interested in the amplitude, or strength, of its signal. ![]() The devices that use WWVB interpret the digital time code transmitted by the station to stay in sync with NIST’s atomic clocks in Boulder, Colorado. The WWVB signal is sent from a transmitter in Fort Collins, Colorado, on a carrier frequency of 60 kilohertz (kHz). WWVB is a low-frequency station, operated by NIST, that provides precise time information to radio-controlled clocks across North America. ![]() Today, it’s one of my favorites, but that’s not because it broadcasts a pleasant mix of Top 40 hits. WWV (Fort Collins, CO) 2.Two years ago, I had never heard of the WWVB radio station. The warnings in the tables below will no longer be broadcast after January 31, 2019. The WWV number receives over 1 million calls per year, and the WWVH number receives more than 50,000.įor some further information on WWV, WWVH and time signals worldwide, see NGA Publication 117 "Radio Navigational Aids"Īll NWS marine forecasts rely heavily on the Voluntary Observing Ship (VOS) program for obtaining meteorological observations. These are not toll-free numbers callers outside the local calling area are charged for the call at regular long-distance rates. Callers are disconnected after 2 minutes. ![]() The audio portions of the WWV and WWVH broadcasts can also be heard by telephone. The National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards, broadcasts a time and frequency service from stations WWV in Fort Collins, CO and WWVH in Kauai, Hawaii., commonly known to mariners as the "Time Tick", used as an aid in celestial navigation.ĭiscrimination between the two stations may be accomplished as WWV uses a male announcer for announcement of time, while WWVH uses a female announcer. National Weather Service Products via WWV, WWVH HF Voiceĭiscontinuation of NWS High Seas and Storm Warnings over NIST Time Frequency Broadcasts Effective January 31, 2019
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