Re: 3 upcoming iss orbit boost's.

From: Bill Bard (wbard@wb-web.org)
Date: Tue May 15 2012 - 12:11:10 UTC

  • Next message: Tony Beresford: "correction satobs May 15 @ 8597"

    Regarding visibility of the burn, if this is similar to that used by the shuttle OMS, it is visible starting up. While burning when in the sun, it looked similar to a shuttle water dump, like a fan shaped glow.
    
    Bill
    
    On May 15, 2012, at 7:55 AM, David Tiller <dtiller@captechconsulting.com> wrote:
    
    > I don't know if this has been covered already - if it has I apologize.
    > 
    > Regarding the ISS boosts:
    > 
    > After a fair amount of rooting around on the internet I found that the engines on Zvezda use N2O4/UDMH as the oxidizer and fuel, respectively, and according to this link (http://yarchive.net/space/rocket/exhaust_color.html) that combination burns with a nearly invisible flame. 
    > 
    > Given that, is the burn visible from the Earth, either during a sunlit or a non-sunlit pass?
    > 
    > --
    > David Tiller
    > Lead Consultant/Architect | CapTech
    > (804) 304-0638 | dtiller@captechconsulting.com
    > 
    > ________________________________________
    > From: seesat-l-bounces+dtiller=captechconsulting.com@satobs.org [seesat-l-bounces+dtiller=captechconsulting.com@satobs.org] on behalf of Bob Christy [bob@zarya.info]
    > Sent: Tuesday, May 15, 2012 5:40 AM
    > To: seesat-l@satobs.org
    > Subject: Re: 3 upcoming iss orbit boost's.
    > 
    > Only the third one on May 24 is a genuine orbit boost. The other two are
    > markers for 'disturbances in the Force' caused by docking and berthing
    > operations when the Soyuz TMA-04M and Dragon COTS 2+ vehicles arrive.
    > 
    > The first one is timed at 138/04:38:29.000 (ie March 17), one second
    > after TsUP's target docking time for Soyuz.
    > 
    > Bob Christy
    > 
    > 
    > On 15/05/2012 04:50, Kevin Fetter wrote:
    >> http://spaceflight1.nasa.gov/realdata/sightings/SSapplications/Post/JavaSSOP/orbit/ISS/SVPOST.html
    >> 
    >> Kevin
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