pbobos grunt decay prediction

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a.lavari@gmail.com

Hi  everyone
With considering USSTRATCOM TLEs  from epoch 11349.93297346 to
12002.90365258 and  extrapolating  I have obtained a graph (height of
perigee above sphere  versus  time)by HEAVENSAT .
if we suppose  minimum altitude for satellite burning to start  at
elevations  between 150 to 155 km above see level (like ROSAT
satellite)decay time can be 13 JAN +-2 day.
Really what is the minimum altitude for this satellite to start reentry?

                  http://haftaseman.ir/images/phobos10.gif
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