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    Re: A different kind of positional astronomy
    From: Brad Morris
    Date: 2017 Oct 18, 18:45 -0400
    Hello Herbert

    Recent news articles have been reporting that a pair of neutron stars merged.  The LIGO systems that are operational detected gravitational waves.  They were able to narrow the source to within a 28° sector of the sky.  Upon alerting other observatories, they were able to correlate the observation in gravitational waves with energy in other spectra, for example, visible light for the very first time.  You can find this information right now, in the accredited media.  It's really quite informative.  Prior detection of gravitational waves did not have other spectra components, as they were associated with black holes.

    Jing was (humorously?) offering up a hand held LIGO detector as tool to determine position, ignoring the size of the LIGO detector and the huge synthetic aperture required to obtain even a 28° window.  But assuming you had one, determining your lat, long to 28° isn't a spectacular result :)

    Astronomy is one step removed from Celestial Navigation.  It is a nominally permitted topic.


    On Oct 18, 2017 6:30 PM, "Herbert Prinz" <NoReply_HerbertPrinz@fer3.com> wrote:
    "The LIGO detector was only able to provide an observation to 28°.   The much finer observed values utilized different spectrums."
    What are we talking about ????

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