Re: Briz 3rd stage

From: Phillip Clark (
Date: Tue Mar 19 2002 - 14:39:33 EST

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    On Tue, 19 Mar 2002, Paul J Henney wrote:
    > I am a little confused about the sataus of the BRIZ 3 stage from Sundays
    > ROCKOT launch..the website says that the stage was to carry out a deorbit
    > burn about 100 mins into the flight.
    > Did this happen or is the stage still in orbit?
    I had an exchange of e-mails with EUROCKOT on this very subject yesterday
    (Monday) because the web site does say that the Briz-KM stage is to
    perform a "complete de-orbit", and of course it is still in orbit.
    The reply was the "de-orbit" now seems to mean not to bring out of orbit
    to re-entry/landing but simply to remove from the operating orbit, and it
    is in this sense that Briz-KM was "de-orbited".   I have suggested to
    EUROCKOT that they might like to word their announcements more precisely
    in future because in more than 40 years of following and writing about
    spaceflight "de-orbit" has implied atmospheric re-entry, etc.
    I would seem that a similar abuse of the "de-orbit" term is used got GEO
    satellites.   When removed from the GEO band - either up or down - they
    are "de-orbited".
    Perhaps I am just old-fashioned and too pedantic ......
    Phillip Clark
    Phillip S Clark                                  Flat 2 Wellington House
    Molniya Space Consultancy                        Castle Hill Passage
    Compiler/Publisher, Worldwide Satellite          Hastings
        Launches                                     E Sussex  TN34 1PG
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