Re: TLE for Discovery at T+20 min

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Fri Aug 10 2001 - 04:29:32 PDT

  • Next message: Ted Molczan: "USA 116 elements and observations"

    STS-105 OMS-1 launch 21:15 2001-08-10
    1 99105U          01222.94343571  .00071000  00000-0  10050-3 0  9005
    2 99105  51.6355 173.0902 0134629 351.2267   8.6582 16.47181754    20
    extrapolated from:
    ----- Original Message -----
    From: "Daniel Deak" <dan.deak@sympatico.ca>
    
    My own ET opportunities are at 2.1 degrees altitude (!), but despite the new
    launch time it is still at horizon on shadow entry.
    
    From the London area, it will rise in the W to 17 degrees before shadow
    entry at 21:34 UTC.
    
    > I think it'll be visible.  Naively adding the difference in the launch
    > times to the TLEs posted by Daniel Deak puts it just ahead of the ISS.
    
    You must also add the change in siderial time (-4.7 degrees) to RAAN.
    
    > STSOrbit Plus is not too good at getting the altitudes right for these
    > ascents - it gives an altitude of 41km at this point which would I think
    
    Neither is any program using SGP4 - set SkyMap to use SGP, or use QuickSat,
    or replace 10050-3 by 10000-8 or 00000-0 in the elset.
    
    
    
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