Re: ISS Lunar Transit Tonight

From: Bjorn Gimle (b.gimle@chello.se)
Date: Thu Apr 10 2003 - 17:11:57 EDT

  • Next message: Thomas Fly: "Re: ISS Lunar Transit Tonight"

    I used SkyMap and the five latest elsets
    The latest one, 0.25 days before the transit, and the one 0.60 before agree
    that the centerline is one mile N of his coordinates. The others need
    another mile or two.
    
    ISS 0.25 d
    1 25544U 98067A   03100.80462084  .00021077  00000-0  28168-3 0  8787
    2 25544  51.6339 358.6614 0006690   4.5589 106.2561 15.57982134250490
    ISS 0.30 d
    1 25544U 98067A   03100.74128571  .00021080  00000-0  28168-3 0  8773
    2 25544  51.6333 358.9858 0006042   3.0066 112.3466 15.57990638250481
    ISS 0.60 d
    1 25544U 98067A   03100.65661166  .00022688  00000-0  29612-3 0  8764
    2 25544  51.6348 359.4067 0003284   5.6106 354.5443 15.58014376250474
    ISS 0.90 d
    1 25544U 98067A   03100.17109874  .00021803  00000-0  28168-3 0  8756
    2 25544  51.6356   1.8359 0004257  44.5419 109.6993 15.58876865250394
    ISS 1.30 d
    1 25544U 98067A   03099.77720405  .00020500  00000-0  26546-3 0  8748
    2 25544  51.6352   3.8139 0004312  42.1567  60.1039 15.58858219250337
    
    
    ----- Original Message -----
    From: "Matson, Robert" <ROBERT.D.MATSON@saic.com>
    To: "'Thomas Fly'" <tfly@alumni.caltech.edu>; <SeeSat-L@satobs.org>
    Sent: Thursday, April 10, 2003 10:21 PM
    Subject: ISS Lunar Transit Tonight
    
    
    > Hi Thomas and List,
    >
    > I sent Thomas Laskowski transit centerline predictions based on an ISS
    > TLE I have from yesterday evening.  Coordinates at 5-second intervals
    > around the time of closest approach to South Bend were:
    >
    >   Date     UTC Time   Latitude   Longitude
    > ---------- --------  ---------  ----------
    > 2003/04/11  1:30:45   42.3136    -87.1961
    > 2003/04/11  1:30:50   42.1138    -86.8367
    > 2003/04/11  1:30:55   41.9129    -86.4796
    > 2003/04/11  1:31:00   41.7107    -86.1248
    > 2003/04/11  1:31:05   41.5075    -85.7724
    > 2003/04/11  1:31:10   41.3031    -85.4222
    > 2003/04/11  1:31:15   41.0976    -85.0743
    >
    > These do not agree at all with Thomas Fly's predictions, so either we are
    > using very different two-line elements, or there's a bug in Tom's code.
    > I used the following TLE:
    >
    > ISS
    > 1 25544U 98067A   03099.77720405  .00020500  00000-0  26546-3 0  8748
    > 2 25544  51.6352   3.8139 0004312  42.1567  60.1039 15.58858219250337
    >
    > Cheers,
    > Rob
    >
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    >
    
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