Re: Oscar-13 Final Final

Bjoern Gimle (b_gimle@algonet.se)
Thu, 5 Dec 1996 07:10:30 +0100 (MET)

Although not stated in this mail (like in his previous one) I hope
James means we should publish this to SeeSat-L.

I want to thank James, and Freddy de Guchteneire and all of AMSAT,
for letting us observe this drama, if only in writing.

I wish the observers of the US and Canada best of luck in seeing
the decay. I missed my only pass without a 100% cloud cover in 6 weeks,
which was on a Monday morning with particularly lousy NASA elsets.

Thanks again for your remarkably accurate predictions. (I should
have trusted them earlier)

>
>                       Oscar-13   Final   Final
>                         
>                        by James Miller G3RUH
>                         
>                      1996 Dec 05 [Thu] 0045 utc
>
>
>
>
>Folks; I'm going to stick my neck out.  I believe AO-13 will re-enter in
>about 9 hours from the release of this note, at the end of orbit 6542.
>
>My integration of the equations of motion is keeping parity with Norad
>2-line parameter values except for a time shift of 3h 40m.  My best
>shot at the final orbit is:
>
>
>AO13-6542
>1 31042U 88051B   96340.364439018 .00000000  00000-0  10000-4 0 12047
>2 31042  56.8778  65.6127 0603404  62.6033 191.8761 15.25807416 65426
>
>This was computed from an initial State Vector dated 1996 Aug 28 !
>
>"Perigee" is over the middle of America ...
>
>My best estimate of its geographical position is as below.  The debris,
>if any, ends up in the Atlantic Ocean, 830 km North of the Azores.
>
>
>Date             utc          Height    Lat      Lon      Speed
>-------------------------------------------------------------------
>1996 Dec 5 [Thu] 0913:49      293       -1       212      7590
>1996 Dec 5 [Thu] 0914:49      269        2       214      7618
>1996 Dec 5 [Thu] 0915:49      246        5       216      7645
>1996 Dec 5 [Thu] 0916:49      225        9       218      7671
>1996 Dec 5 [Thu] 0917:49      204       12       220      7695
>1996 Dec 5 [Thu] 0918:49      186       16       222      7717
>1996 Dec 5 [Thu] 0919:49      168       19       224      7738
>1996 Dec 5 [Thu] 0920:49      153       22       226      7757
>1996 Dec 5 [Thu] 0921:49      139       25       229      7773
>1996 Dec 5 [Thu] 0922:49      127       28       232      7788
>1996 Dec 5 [Thu] 0923:49      116       31       235      7800
>1996 Dec 5 [Thu] 0924:49      108       33       238      7808
>1996 Dec 5 [Thu] 0925:49      102       36       241      7809
>1996 Dec 5 [Thu] 0926:49       97       38       245      7799
>1996 Dec 5 [Thu] 0927:49       94       40       249      7773  (*)
>1996 Dec 5 [Thu] 0928:49       93       42       254      7731
>1996 Dec 5 [Thu] 0929:49       93       43       259      7683
>1996 Dec 5 [Thu] 0930:49       93       45       265      7637
>1996 Dec 5 [Thu] 0931:49       94       46       271      7596
>1996 Dec 5 [Thu] 0932:49       94       47       277      7556
>1996 Dec 5 [Thu] 0933:49       95       47       284      7525
>1996 Dec 5 [Thu] 0934:49       94       47       292      7488
>1996 Dec 5 [Thu] 0935:49       92       47       299      7452
>1996 Dec 5 [Thu] 0936:49       89       47       306      7391
>1996 Dec 5 [Thu] 0937:49       84       47       313      7271
>1996 Dec 5 [Thu] 0938:49       76       46       319      6947
>1996 Dec 5 [Thu] 0939:49       64       45       325      5561
>1996 Dec 5 [Thu] 0940:49       45       45       328      1412
>1996 Dec 5 [Thu] 0941:49       23       45       329      1393
>------------------------------------------------------------------
>                               km      +=N       +=E       m/s
>
>(*) Maximum drag - Salt Lake City
>
>-- 
>============================================================================
>   James R Miller                    E-mail:    g3ruh@amsat.org
>  Cambridge England                  Stardate:  1996 Dec 05 [Thu] 0034 utc
>============================================================================



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