re: STS-114 TLE's

From: Walter Nissen (wnissen@tfn.net)
Date: Mon Jul 11 2005 - 11:02:41 EDT

  • Next message: Allen Thomson: "Re: STS-114 Launch Window/Plane"

    Hi, Joe, Gerhard, Ted, all,
    
    Besides the uncertainty of the launch time, the drag factors in the
    elsets from
    http://spaceflight.nasa.gov/realdata/sightings/SSapplications/Post/JavaS
    SOP/orbit/SHUTTLE/SVPOST.html
    are ridiculously high, especially since the MM is dramatically
    decreasing during the chase of the ISS.
    Thus, those elsets have a very short lifetime, perhaps measured in a few
    revs.
    BTW, the corresponding URL for ISS elsets is
    http://spaceflight.nasa.gov/realdata/sightings/SSapplications/Post/JavaS
    SOP/orbit/ISS/SVPOST.html
    
    
    Joe Rao writes:
    
    > I would assume that upon liftoff from Florida, the ISS will be
    > running roughly 15 to 20 minutes "ahead" of the Shuttle.  Here on the
    > US East Coast, I suspect that we might have a chance to see STS-114
    > trailing roughly that many minutes behind the ISS on Wednesday evening
    > and about half that amount on Thursday evening.
    
    The situation as seen from here on the North Coast, not too far west of 
    you, is different.
    I fed what I believe to be the appropriate elsets from
    spaceflight.nasa.gov into my ancient version of QuickSat (highly
    recommended) and find the interval between the objects to be much
    greater on the 14th UT.
    Many details appear below.
    
    We are close enough to the solstice that these events, though evening
    rather than morning, still occur quite late for many civilians.
    
    
    > By Friday evening, both ISS and the orbiter should be docked and will
    > appear as a singular object.
    
    Yes.
    
    
    Of course, we can anticipate that updated prospective elsets may appear
    in the next few days.
    
    
    Cheers.
    
    Walter Nissen                   wnissen@tfn.net
    -81.8637, 41.3735, 256m elevation
    
    ---
    
    I'm a federal judge.  My job is to jail reporters who are just doing
    their jobs, although none of the criminals have even been charged.
    
    ---
    
    Elsets from spaceflight.nasa.gov:
    
    ISS             weav
    1 25544U 98067A   05194.73022037  .00020000  00000-0  20000-3 0  9079
    2 25544  51.6444 124.9392 0002946 106.9413 253.2072 15.71506471 19863
    NC-1            weav via molc 191.96      for 7/14       227 X 307 km
    1 99114U          05195.06995586  .00189937  00000-0  37621-3 0  9025
    2 99114  51.6480 123.4651 0060182 182.0050 178.0896 16.02742764    58
    ISS             weav
    1 25544U 98067A   05195.68405725  .00020000  00000-0  20000-3 0  9084
    2 25544  51.6438 120.0583 0002821 113.3258 246.8201 15.71556048 20012
    SHUTTLE         weav                      for 7/15
    1 99114U          05195.94576334  .00189937  00000-0  37621-3 0  9051
    2 99114  51.6433 118.8044 0017046 210.0669 149.9527 15.92093886   194
    
    ---
    
    Sample input to QuickSat:
    
     2005  7 Year, month number
     13 13 Start date, end date
     -0.5   .5 Start time, end time
       41.3735   81.8637      840.    Nissen, OH
      0 UT  correction and time zone name for UT to CDT
     F True means generate Radio predictions
     1950 Epoch of predicted RA, Dec
     17.5 Magnitude limit
      4 Altitude cut-off value
     0.1 The search/step parameter value
     F True means accept only the most recent elements for each object
     F True means ignore shadow test
     F  0 True means generate multiple prediction points, how many each way
     F True means output distance values in miles
     F True means generate a blank line before each object's prediction.
    qs.mag       Intrinsic magnitudes input file
    714.tk       Output file
    714.tle      Elements input file
    EOF
    
    ---
    
    Edited output from QuickSat:
    
      41.374  81.864  840.    Nissen, OH            1950 17.5  4 F F F F F
    
    ***  2005 July 12  *** Times are UT ***   2 0  9 3
    
     H  M  S  TIM AL AZI C   U  MAG   REVS  HGT SHD  RNG  EW PHS  R A   DEC
    25544 ISS Complex                       .1
     2 17 15   .0 16  16 C 104  2.1    7.0  361 296 1041 1.2 113  153  61.1
    25544 ISS Complex                       .1
     3 51 51   .0 31 317   116   .8    8.0  361  27  649 1.7 123 1134  55.0
    
    ***  2005 July 13  *** Times are UT ***   159  9 4
    
     H  M  S  TIM AL AZI C   U  MAG   REVS  HGT SHD  RNG  EW PHS  R A   DEC
    25544 ISS Complex                       .1
     2 44 42   .0 29  25 C 113   .5   23.0  361 173  693 1.7 102  010  65.7
    25544 ISS Complex                       .1
     4 17 33   .0 11 286   118  3.1   24.0  361  29 1282  .6 116 12 2  19.8
    
    ***  2005 July 14  *** Times are UT ***   158  9 5
    
     H  M  S  TIM AL AZI C   U  MAG   REVS  HGT SHD  RNG  EW PHS  R A   DEC
    25544 ISS Complex                       .1
     1 36 15   .0 17  17 C 105  1.8    6.0  361 346 1002 1.3 106  1 7  61.4
    99114 NC-1
     2  8 41   .0 17  23 C 111 21.0     .8  262 178  748 1.6 104  1 0  58.8
    
    25544 ISS Complex                       .1
     3 11 45   .0 71 325   121 -1.2    7.0  361  29  381 3.2  89 1556  55.5
    99114 NC-1
     3 40  7   .0 10 291   118 23.0    1.8  258  25 1026  .7 128 1115  22.4
    
    ***  2005 July 15  *** Times are UT ***   157  9 6
    
     H  M  S  TIM AL AZI C   U  MAG   REVS  HGT SHD  RNG  EW PHS  R A   DEC
    25544 ISS Complex                       .1
     2  3 40   .0 32  27 C 115   .2    7.0  361 271  638 1.8  96 23 4  66.7
    99114 SHUTTLE
     2 11 56   .0 33  28 C 116 19.7    2.7  306 189  540 2.1  95 23 2  65.8
    
    25544 ISS Complex                       .1
     3 37 34   .0 18 268   124  1.6    8.0  361  24  962  .6 105 1241  10.3
    99114 SHUTTLE
     3 43 54   .0 10 275   122 23.0    3.8  305  21 1189  .4 114 12 3  10.3
    
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