Re: pbobos grunt decay prediction

From: Paul Salanitri (
Date: Tue Jan 03 2012 - 20:12:55 UTC

  • Next message: Ted Molczan: "Fobos-Grunt: decay estimate"

    80km is the altitude when the re-entry interface really starts to happen,
    however, with analytical tools (such as HEAVENSAT), you won't get a true
    estimation of when that will occur.  Other tools such as SatEvo will
    "propagate" the orbit (still an analytical tool) to get a closer
    Based on numerical tools that I'm running, the decay time is closer to 17
    JAN +/- 2 days.
    Paul Salanitri
    On Wed, Jan 4, 2012 at 4:55 AM, abdolreza lavari <> wrote:
    > 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?
    > _______________________________________________
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