• time marker

    From Hul Tytus@21:1/5 to All on Fri Jan 17 16:52:37 2025
    I'm looking into a time marker modulated onto a rf carrier that is
    simple and at the same time accurate. The marker on the low frequency
    signal carrying the US time reference which is said to invert the carrier
    to mark the time certainly sounds simple. The remarkable accuracy of the
    RTK GPS devices, actual inches are claimed, suggests a very accurate
    means of reading the time marker.
    Anyone know of a text that deals with such circuitry or perhaps a
    schematic of a gps reciever with enough detail to show how it's done?

    Hul

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  • From Don Y@21:1/5 to Hul Tytus on Sun Jan 19 10:10:26 2025
    On 1/17/2025 9:52 AM, Hul Tytus wrote:
    I'm looking into a time marker modulated onto a rf carrier that is
    simple and at the same time accurate. The marker on the low frequency
    signal carrying the US time reference which is said to invert the carrier
    to mark the time certainly sounds simple. The remarkable accuracy of the
    RTK GPS devices, actual inches are claimed, suggests a very accurate
    means of reading the time marker.

    Are you looking to know the time AT that instant? I.e., from, potentially, just ONE event? How soon after the event do you want to know the time?
    Or, are you willing to use *those* markers to discipline your own clock?

    Anyone know of a text that deals with such circuitry or perhaps a schematic of a gps reciever with enough detail to show how it's done?

    Hul

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  • From Don Y@21:1/5 to Don Y on Sun Jan 19 10:12:42 2025
    On 1/19/2025 10:10 AM, Don Y wrote:
    On 1/17/2025 9:52 AM, Hul Tytus wrote:
        I'm looking into a time marker modulated onto a rf carrier that is
    simple and at the same time accurate. The marker on the low frequency
    signal carrying the US time reference which is said to invert the carrier
    to mark the time certainly sounds simple. The remarkable accuracy of the
    RTK GPS devices, actual inches are claimed, suggests a very accurate
    means of reading the time marker.

    Are you looking to know the time AT that instant?  I.e., from, potentially, just ONE event?  How soon after the event do you want to know the time?
    Or, are you willing to use *those* markers to discipline your own clock?

        Anyone know of a text that deals with such circuitry or perhaps a
    schematic of a gps reciever with enough detail to show how it's done?

    <https://www.hopf.com/dcf77-gps_en.php>

    Other "technologies" approach the problem differently. Horses for courses.

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