[FPSPACE] Soyuz ascent question

jameseoberg at comcast.net jameseoberg at comcast.net
Wed Oct 12 10:55:32 EDT 2016

Based on the Soyuz/Meridian users manual, I'm roughing out the following for 425 sec into flight: 
alt = 180 km 
V = 5050 m/sec 
downrange 1050 km 

http://www.arianespace.com /wp -content/uploads/2015/09/Soyuz-Users-Manual-March-2012.pdf 

----- Original Message -----

From: jameseoberg at comcast.net 
To: "fpspace" <fpspace at mail.friends-partners.org> 
Sent: Tuesday, October 11, 2016 10:33:37 PM 
Subject: [FPSPACE] Soyuz ascent question 

I'm finishing up my review draft on ground obervations 
of the Meridian-5 launch failure [dec 23, 2011] and 
would like to get estimated vehicle flight parameters 
at the moment of the failure, 425 seconds. Specifically, 
how high [I think about 190 km], how fast, and 
how far downrange -- to coordinate with reports 
from ground observers. 

I'm happy to assume normal Soyuz 3-stage-to-orbit 
figures, shouldn't be noticeably different for Fregat/Meridian 
missions, right? 

I hope this is a quick matter for folks with the right 
tools and reference charts. Thanks!! 

Jim O 

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