RE: Flare Visibility From Torquay

From: Marcus Clark (marcus_j_clark@hotmail.com)
Date: Fri Mar 20 2009 - 12:00:19 UTC

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    Thanks Bjoern!
    I'll perservere with my observations. As you say, I guess all data is useful at this stage!
    Best regards,
               Marcus Clark
    ----------------------------------------
    > From: bg_26934@glocalnet.net
    > To: marcus_j_clark@hotmail.com; satrack@libero.it
    > CC: SeeSat-L@satobs.org
    > Subject: Re: Flare Visibility From Torquay
    > Date: Fri, 20 Mar 2009 12:48:55 +0100
    >
    > Hi Marcus,
    >
    > apologies for not responding promptly.
    > 525 km was "out of the blue", just to verify that the selection did produce
    > the correct output.
    > As Simone pointed out, the prediction algorithm is still experimental, so it
    > is useful to observe from far.
    > An ideal reflection has a cone width of the Sun = .5 degrees. I don't know
    > how ideal NOSS's flaring surface is.
    > If NOSS is at 1100 km height near zenith, this is just 10 km wide, but
    > lower=longer range=wider beam, and it is also elliptical, pointing away from
    > the satellite because of the oblique view.
    > And if the surface is not "shiny"=specular it becomes wider yet.
    >
    > /Björn
    >
    > ----- Original Message -----
    > From: "Marcus Clark" 
    > To: "Satrack" ; "Bjoern Gimle" ;
    > "SeeSat Posts" 
    > Sent: Friday, March 20, 2009 10:43 AM
    > Subject: Flare Visibility From Torquay
    >
    >
    >
    > Hi!As Bjoern has pointed out, SkyMed gives visible NOSS flare prediction
    > from Torquay UK (50.5 N, 3.5 W) today about 19:28 UTC if I input the txt
    > file from the flare tracker website and set Maximum Distance to 525km.
    > Is 525km an appropriate value and could you explain how the Max Distance
    > value should be determined? Is it simply related to the height of the
    > objects orbit or is it more to do with the horizon, or both?
    > I am ignorant of orbital elements but willing to learn!!
    > Best regards,
    > Marcus Clark
    >
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