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  • Re: Weather forecasts - please blacken coastlines [Nit-pick]

    From John Williamson@21:1/5 to Liz Tuddenham on Tue Sep 26 09:29:06 2023
    On 26/09/2023 09:16, Liz Tuddenham wrote:
    Andy Burns <usenet@andyburns.uk> wrote:

    [...]
    Some aren't and you have to grab the signal as they fly over, but others
    (GOES-E and GOES-W) are geostationary and effectively have half the
    planet in view between them.

    Impossible, unless they are infintely far away. :-)


    Geostationary orbit gives them almost a third of the planet each, if you
    can remove the distortion round the edges. Allowing for overlaps, half
    the planet isn't too far off a usable result.

    That's why the satellite broadcasters only really need 3 satellites to
    cover everywhere except the Arctic and Antarctic. The extras are for
    bandwidth.

    --
    Tciao for Now!

    John.

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  • From J. P. Gilliver@21:1/5 to liz@poppyrecords.invalid.invalid on Tue Sep 26 09:31:47 2023
    In message <1qhnqc8.6ckjdm12x40o0N%liz@poppyrecords.invalid.invalid> at
    Tue, 26 Sep 2023 09:16:36, Liz Tuddenham
    <liz@poppyrecords.invalid.invalid> writes
    Andy Burns <usenet@andyburns.uk> wrote:

    [...]
    Some aren't and you have to grab the signal as they fly over, but others
    (GOES-E and GOES-W) are geostationary and effectively have half the
    planet in view between them.

    Impossible, unless they are infintely far away. :-)


    I see where you're coming from, but he did say "between them".
    --
    J. P. Gilliver. UMRA: 1960/<1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

    "Knowledge isnt elitist - that's rubbish! Why are we embarrassed by the idea that people know things? It's not a conspiracy against the ignorant. Knowing things is good!" - Jeremy Paxman, RT 14-20 August 2010

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  • From Andy Burns@21:1/5 to John Williamson on Tue Sep 26 09:47:58 2023
    John Williamson wrote:

    Liz Tuddenham wrote:

    Andy Burns wrote:

    (GOES-E and GOES-W) are geostationary and effectively have half
    the planet in view between them.

    Impossible, unless they are infintely far away.   :-)

    Geostationary orbit gives them almost a third of the planet each, if you
    can remove the distortion round the edges. Allowing for overlaps, half
    the planet isn't too far off a usable result.

    <https://cdn5.slideserve.com/9658536/satellite-meteorology-n.jpg>

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  • From Liz Tuddenham@21:1/5 to Andy Burns on Tue Sep 26 09:16:36 2023
    Andy Burns <usenet@andyburns.uk> wrote:

    [...]
    Some aren't and you have to grab the signal as they fly over, but others
    (GOES-E and GOES-W) are geostationary and effectively have half the
    planet in view between them.

    Impossible, unless they are infintely far away. :-)


    --
    ~ Liz Tuddenham ~
    (Remove the ".invalid"s and add ".co.uk" to reply)
    www.poppyrecords.co.uk

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