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    Re: Radio Clock or Internet GMT - which should I believe?
    From: Paul Hirose
    Date: 2012 Mar 04, 11:21 -0800

    I haven't seen anyone mention the Web clock at the USNO site:
    
    http://www.usno.navy.mil/USNO
    
    Over the past few years I've checked it many times against a shortwave 
    radio. It's always perfect. By eye and ear I cannot detect any 
    discrepancy with WWV's time ticks. And these checks have used a dial up 
    connection.
    
    The clock won't display unless Javascript is enabled in your browser.
    
    A link on that page will lead you to animated GIF clocks. On my system 
    these kept freezing up after running less than 30 seconds. Also, the 
    clocks were about half a second off from WWV.
    
    GPS receiver time display – the error can depend on the screen you have 
    selected. One of my receivers is 1 or 2 seconds slow on the position 
    readout screen. But on the screen that leads to the setup menus, the 
    time is dead on.
    
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