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Shuttle Questions Q & A (Part 4) by Skinny on 03 Nov, 2007 00:58
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To keep everything at readable proportions, this is part 4 of the highly informative thread. Below are the links to previous parts. Please use the search function to see if your question has been answered before. Have Fun!
Shuttle Q&A Part 1
Shuttle Q&A Part 2
Shuttle Q&A Part 3
Shuttle Q&A Part 4
Shuttle Q&A Part 5 -
#1 by Skinny on 03 Nov, 2007 01:01
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Lee Jay - 2/11/2007 7:24 PM
QuoteAndy_Small - 2/11/2007 6:03 PM what is the velocity of the vehicle at SRB separation?
Usually a little better than Mach 4, or about 3000mph. -
#2 by Skinny on 03 Nov, 2007 01:02
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psloss - 2/11/2007 7:50 PM FYI, Bill Harwood publishes this data for every shuttle mission: http://www.cbsnews.com/network/news/space/120/120ascentdata.html
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#3 by Andy_Small on 03 Nov, 2007 02:17
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Thanks for the link psloss. bookmarked.
and thanks Skinny for the new thread -
#4 by ksc_houston on 04 Nov, 2007 06:35
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What TRDSs are used for Shuttle/ISS ?
ZOE is the moment of KU loss, but what is the moment of KU aqusition ?
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#5 by Jim on 04 Nov, 2007 10:48
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ZOE is "Zone of Exclusion". It's boundaries determine coverage. Western boundary loss of signal and eastern AOS
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#6 by ksc_houston on 04 Nov, 2007 10:55
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"ZOE" is represented on the map from MCC, but where is AOS ?
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#7 by Jim on 04 Nov, 2007 10:57
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on the eastern boundary
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#8 by ksc_houston on 04 Nov, 2007 11:21
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US eastern bounday ? Now ISS is over the eastern Atlantic and they don't have KU. I don't understand this.
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#9 by Jim on 04 Nov, 2007 11:32
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ZOE is not a generic term for loss of Ku coverage. ZOE is a gap in Ku coverage that always resides over the Indian Ocean, where TDRS spacecraft are out of view of the ISS. ZOE does not describe outages for the rest of the orbit.
KU coverage is not always available during orbits due to blockages from the ISS structure while the orbiter docked -
#10 by ZANL188 on 04 Nov, 2007 12:44
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ksc_houston - 4/11/2007 6:21 AM
US eastern bounday ? Now ISS is over the eastern Atlantic and they don't have KU. I don't understand this.
TDRS has many users besides ISS & Shuttle. Ku may not always be available if other users need the capacity. -
#11 by GLS on 04 Nov, 2007 19:59
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What happens to the LES after a mission? Are they cleaned up and reused by another crew or what?
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#12 by Jim on 04 Nov, 2007 21:21
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yes
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#13 by GLS on 04 Nov, 2007 21:41
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thanks
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#14 by j2_ on 04 Nov, 2007 23:07
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They haven't used the LES since 1995. The new suit is called ACES (Advanced Crew Escape Suit).
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#15 by ChrisGebhardt on 05 Nov, 2007 04:14
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I know there is a restriction (for safety reasons) that prevents a Space Shuttle from landing at KSC at the same time another rocket is launching from Cape Canaveral. But how long is this restriction? Can a Shuttle land at KSC and an unmmaned rocket launch an hour later? Or vis versa? Or would it be a 48 hour restriction like launch due to Eastern Range reconfiguration? Thanks in advance.
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#16 by Jim on 05 Nov, 2007 04:33
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It isn't a 48 hr restriction and I don't think it is a set number
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#17 by joncz on 05 Nov, 2007 14:30
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Question re: Shuttle/ISS separation.
Is it correct that the shuttle's separation is in the +V -R direction?
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#18 by Jorge on 05 Nov, 2007 14:40
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joncz - 5/11/2007 9:30 AM
Question re: Shuttle/ISS separation.
Is it correct that the shuttle's separation is in the +V -R direction?
The initial orbiter separation from ISS is along the velocity vector or +Vbar. The flyaround is initiated by a radial-out burn that carries the orbiter towards the negative radius vector or -Rbar. The flyaround continues through the -Vbar, +Rbar, then back to the +Vbar. At the +Vbar, the first separation burn is performed, 1.0 fps radial-out, which carries the orbiter above and behind ISS. The second separation burn (1.0 fps in the direction of velocity) is performed 28 minutes later. It carries the orbiter further behind ISS. -
#19 by joncz on 05 Nov, 2007 14:44
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Thanks! I always thought the separation was down and forward.