Author Topic: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates  (Read 47190 times)

Offline cletus

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Offline Steven Pietrobon

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #141 on: 06/17/2016 06:52 AM »
Here it is on YouTube.

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Robotbeat

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #142 on: 06/18/2016 03:22 AM »
Did the fire burn faster or slower than they expected?

(Yes, yes, I realize this could take months to get anything remotely publishable, so I would like someone who actually knows about this and is involved with it to answer...)
Chris  Whoever loves correction loves knowledge, but he who hates reproof is stupid.

To the maximum extent practicable, the Federal Government shall plan missions to accommodate the space transportation services capabilities of United States commercial providers. US law http://goo.gl/YZYNt0

Offline jcm

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #143 on: 06/22/2016 03:44 AM »
4 of the cubesats ejected from Cygnus have been cataloged
as 41595-41598  (2016-019B to E) Does anyone know when the ejection was?
-----------------------------

Jonathan McDowell
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Offline northenarc

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #144 on: 06/22/2016 10:19 AM »
 This sounds interesting, hopefully we'll get to see some video.   

http://www.usatoday.com/story/news/2016/06/21/scientists-anxious-watch-space-junks-re-entry/86193408/

Online Chris Bergin


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#Cygnus reentered the atmosphere at 9:29 am EDT, concluding a successful OA-6 mission. We're happy to have honored astronaut Rick Husband.

Online Comga

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #146 on: 06/22/2016 08:36 PM »
4 of the cubesats ejected from Cygnus have been cataloged
as 41595-41598  (2016-019B to E) Does anyone know when the ejection was?

As of 6/19, Heavens Above listed Cygnus in a 388 by 389 km orbit, while n2yo said it was at 406 km.  These straddle the orbit of the ISS, which is H-A listed as 403 by 403 km. 

Regardless of which of these is more accurate, it does not appear that Cygnus went to a higher altitude after departing the ISS, which would greatly increase the orbital lifetime of the cubesats.  Conversely, descending even a few kilometers would eliminate the possibility of the cubesats later hitting the ISS, even if such a hit would be a less than walking speed.  This would be in accord with NASA's extreme (and probably appropriate) risk aversion for the irreplaceable ISS and crew.

The cubesats do not yet show up in either of those databases, or in a few others I have checked, so it can't yet be said if they were released at, above, or below the altitude of the ISS. (or when they were released)  If someone finds them listed and can post their orbits, it would be appreciated.

What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Online AnalogMan

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #147 on: 06/22/2016 09:12 PM »
4 of the cubesats ejected from Cygnus have been cataloged
as 41595-41598  (2016-019B to E) Does anyone know when the ejection was?

From ISS Expedition-48 thread (my bold):

ISS Daily Summary Report 06/21/16

Posted on June 21, 2016 at 4:00 pm by HQ.
 
NanoRacks CubeSat Deployer- External (NRCSD-E) Operations: Following Cygnus unberth last week, today NRCSD-E conducted post departure satellite deployments prior to Cygnus re-entry tomorrow, June 22. This set of cubesats includes 3 deployment silos containing a total of 5 LEMUR satellites.  Two out of three silos (four out of five satellites) were successfully deployed. The Orbital team downlinked and reviewed imagery to ascertain why one of the CubeSats did not deploy. Further troubleshooting is ongoing. The LEMUR satellites are equipped with payloads to provide two primary data products: AIS Data (Maritime Domain Awareness) and GPS-RO Data (Weather). NRCSD-E is a mechanical separation system for small U-class satellites designed specifically to interface with the Orbital-ATK Cygnus cargo resupply vehicle. It consists of an array of up to six individual 6U deployers contained within one mechanical housing that releases the CubeSats from Cygnus after it has completed its primary mission and departed the ISS.

Offline northenarc

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #148 on: 06/23/2016 10:12 AM »
 Sounds like they got video of reentry from the plane but no data from the onboard instruments.

http://www.aerospace.org/news/highlights/rebr-w2-fails-to-send-data-during-fiery-ride-to-earth/

 

Online ZachS09

It seems as if every single reentry experiment is designed to fail. Think about it: ATV-5 had a reentry experiment, but that failed as well.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline MKremer

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #150 on: 06/23/2016 03:13 PM »
It seems as if every single reentry experiment is designed to fail. Think about it: ATV-5 had a reentry experiment, but that failed as well.
I doubt if they deliberately design them to fail. :D
It probably does point to the need to change how or where the re-entry experiment container is located, or if it is in fact an overall poor design/implementation and needs a complete overhaul.

Offline northenarc

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #151 on: 06/23/2016 06:11 PM »
It seems as if every single reentry experiment is designed to fail. Think about it: ATV-5 had a reentry experiment, but that failed as well.
This was ATV-5's reentry experiment, or at least part of it.

Offline gwiz

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #152 on: 06/23/2016 07:09 PM »
REBR-W was scrubbed fromATS 5, but it had a second re-entry experiment, BUC, that was at least partially successful but failed to return images.

Offline Escapist

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #153 on: 06/24/2016 01:07 AM »
Re-Entry video shot from trailing plane.


Offline catdlr

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Re: LIVE: Cygnus OA-6 - Arrival, ISS mission and EOM - Updates
« Reply #154 on: 07/14/2016 03:58 AM »
mission review video....

Orbital ATK OA-6 Mission Review

Orbital ATK

Published on Jul 13, 2016
Take a look at highlights from our OA-6 mission, which concluded on June 22, 2016, three months after its launch aboard a ULA Atlas V rocket. The S.S. Rick Husband Cygnus spacecraft, named for the late space shuttle commander, remained attached to the International Space Station for 81 days while the crew removed 7,900 pounds of cargo then filled it with materials for disposal. After it unberthed from the space station on June 14, the spacecraft hosted two scientific experiments and deployed 4 CubeSats from its NanoRacks CubeSat Deployer. Congratulations on another successful mission, Cygnus!

https://www.youtube.com/watch?v=RZ77ZSdH-04?t=001

Tony De La Rosa

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