Re: Updated elements of USA 193 and Heavens-Above pass predictions

From: Larry Van Horn (n5fpw@brmemc.net)
Date: Fri Feb 01 2008 - 16:59:14 UTC

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    > Apparently space-track.org does not distribute any keplerian data for
    > satellite 29651 (USA 193). I wonder if tracking this object on a public 
    > web
    > site is something appropriate.
    
    There are no laws violated by this so there should be no concerns that we 
    are tracking a non-operational, dead satellite. No different than any other 
    hunk of junk decaying from orbit.
    
    While I am sure that the folks in the NRO aren't happy, there is absolutely 
    nothing that is inappropriate about tracking or monitoring via radio any 
    space object whose information has been derived from public sources 
    (monitoring or visual observation). That is what we can do in a free 
    society. And if the NRO doesn't like it, tough stuff.  If the want that kind 
    of secrecy, they can hot the road and go to a dictatorship. ;-))
    
    Larry Van Horn, N5FPW
    Monitoring Times Assistant/Technical Editor
    Milcom Monitoring Post: http://mt-milcom.blogspot.com/
    Btown Monitoring Post: http://monitor-post.blogspot.com/
    
    
    ----- Original Message ----- 
    From: "Ciprian Sufitchi" <ciprian@sufitchi.com>
    To: <seesat-l@satobs.org>
    Sent: Friday, February 01, 2008 11:42 AM
    Subject: RE: Updated elements of USA 193 and Heavens-Above pass predictions
    
    
    > Hi all,
    >
    > Apparently space-track.org does not distribute any keplerian data for
    > satellite 29651 (USA 193). I wonder if tracking this object on a public 
    > web
    > site is something appropriate.
    > I noticed that http://www.space-track.org currently reports an Internal
    > Server Error.
    >
    > Thanks,
    > Chip N2YO.com
    >
    > -----Original Message-----
    > From: djlaszlo@aol.com [mailto:djlaszlo@aol.com]
    > Sent: Friday, February 01, 2008 11:27 AM
    > To: seesat-l@satobs.org
    > Subject: Re: Updated elements of USA 193 and Heavens-Above pass 
    > predictions
    >
    >
    > Note for  new observers:
    >
    > Chris Peat has kindly added a link for USA 193 on his user-friendly
    > satellite prediction website.  An example page for Estes Park CO is here. 
    > A
    > link on this page allows you to enter your own home location.
    >
    > http://www.heavens-above.com/main.aspx?lat=40.377&lng=-105.521&loc=Estes+Par
    > k&alt=2316&tz=MST
    >
    > The special page link:
    >
    > http://www.heavens-above.com/usa193.aspx?lat=40.377&lng=-105.521&loc=Estes+P
    > ark&alt=2316&tz=MST
    >
    > An example  link which generates a prediction table:
    >
    >
    > http://www.heavens-above.com/PassSummary.aspx?satid=29651&lat=40.377&lng=-10
    > 5.521&loc=Estes+Park&alt=2316&tz=MST
    >
    > Clicking on the table will generate the track of the satellite in the sky.
    > Before these pages were posted, it was possible to make a prediction with
    > the "Select a satellite from the database"  function and put in the 
    > number,
    > 29651, in the first box.  If the Heavens-Above times are bit off from Ted
    > Molczan's, the path in the sky should be pretty close.
    >
    > Cheers, Dan Laszlo, Fort Collins CO
    >
    >
    >
    > -----Original Message-----
    > From: Ted Molczan <ssl2molcz@rogers.com>
    > To: seesat-l@satobs.org
    > Sent: Fri, 1 Feb 2008 6:12 am
    > Subject: Updated elements of USA 193
    >
    >
    >
    > David Brierley has reported new observations:
    >
    > http://satobs.org/seesat/Feb-2008/0006.html
    >
    > The data format of David's report is defined here:
    >
    > http://www.satobs.org/position/UKformat.html
    >
    > The object was about 0.3 s late relative the elements I posted yesterday.
    > Here are updated elements:
    >
    > USA 193          5.0  2.5  0.0  4.3 v                    267 X 275 km
    > 1 29651U 06057A   08032.26673860  .00108121  00000-0  19426-3 0    03
    > 2 29651  58.4892 115.4602 0006491  79.8395 280.3436 16.01043930    04
    > Arc 2008 Jan 30.29 - Feb 01.29, WRMS residuals = 0.029 deg
    >
    > Definition of 2-line elements format:
    >
    > http://spaceflight.nasa.gov/realdata/sightings/SSapplications/Post/JavaSSOP/
    > SSOP
    > _Help/tle_def.html
    >
    > Using Satevo v0.51 with a 10.7 cm solar flux of 71, results in a decay
    > prediction for 2008 March 29, in line with earlier estimates. The
    > uncertainty is at least one week.
    >
    > I have updated the standard visual magnitude calculation:
    >
    > http://satobs.org/seesat_ref/06057A/06057A_stdmag_6.jpg
    >
    > Results are unchanged: mag 4.3 +/- 2, at range 1000 km, phase angle 90 
    > deg.
    > Co-efficient of phase = 1.26 mag/rad (0.0220 mag/deg).
    >
    > Ted Molczan
    >
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