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Dawn Mission, pre-launch disscusion
punkboi
post Nov 3 2006, 06:10 PM
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QUOTE (PhilCo126 @ Nov 3 2006, 06:02 AM) *
Looks like too many people want to send their name ...

huh.gif

http://www.dawn-mission.org/DawnCommunity/...d/nameEntry.asp



About 360,000 names are flying onboard Dawn. Probably would've been a lot more had the mission not been stood down late last year. Not that 360,000 names aren't a lot, already tongue.gif


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Guest_AlexBlackwell_*
post Jan 4 2007, 05:46 PM
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Dawn Journal
Dr. Marc D. Rayman
December 28, 2006
http://dawn.jpl.nasa.gov/mission/journal_12_06.asp
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Bart
post Feb 9 2007, 12:57 AM
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Dr. Marc Rayman will be giving a public lecture on Dawn as part of JPL's von Karman Lecture Series on February 22/23.

See http://www.jpl.nasa.gov/events/lectures/feb07.cfm
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Guest_Zvezdichko_*
post Feb 14 2007, 04:24 PM
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Is there a scientific program for Mars during the Mars flyby?
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punkboi
post Mar 3 2007, 08:09 AM
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New journal:

http://www.dawn-mission.org/mission/journal_2_07.asp


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nprev
post Mar 3 2007, 03:20 PM
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Thanks, PB. Looks like the thermal/vac tests went extremely well, and it's shipping to the Cape this month or next.

Kind of concerned that they didn't get to run a full test on one of the xenon thrusters, though. I know it has three & only one will be used at a time, but sure would hate to see one of them subnominal right off the bat after launch... unsure.gif


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dsmillman
post Mar 25 2007, 06:35 PM
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What is the length of the launch window that opens on June 20?
What time does the launch window open each day and long is the launch window?
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punkboi
post Mar 26 2007, 06:14 AM
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In terms of launch period, I believe that Dawn has till October to lift off. It is misses that, the opportunity to reach Ceres from Vesta won't be possible for around 15 years


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Jim from NSF.com
post Mar 26 2007, 12:00 PM
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QUOTE (punkboi @ Mar 26 2007, 02:14 AM) *
In terms of launch window, I believe that Dawn has till October to lift off. It is misses that, the opportunity to reach Ceres from Vesta won't be possible for around 15 years


That is the launch period. Launch window is the time period each day that a mission can be launched
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Jim from NSF.com
post Mar 26 2007, 12:06 PM
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QUOTE (dsmillman @ Mar 25 2007, 02:35 PM) *
What is the length of the launch window that opens on June 20?
What time does the launch window open each day and long is the launch window?


One second launch windows (It is a Delta II). Launch time varies from 22:05 to 20:25 UTC over the whole launch period
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BPCooper
post Mar 26 2007, 12:24 PM
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When I asked one of the project scientists I was told the window was approximately 5:54pm to 6:20pm EDT June 20.

She seemed to think it was a long window, but I was skeptical since this is a planetary mission.

Jim...6:05pm June 20?


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ugordan
post Mar 26 2007, 12:43 PM
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QUOTE (Jim from NSF.com @ Mar 26 2007, 01:06 PM) *
One second launch windows (It is a Delta II).

Is the 1 second launch window a consequence of LV flexibility or simply a tight performance constraint?


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Jim from NSF.com
post Mar 26 2007, 03:01 PM
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QUOTE (BPCooper @ Mar 26 2007, 08:24 AM) *
When I asked one of the project scientists I was told the window was approximately 5:54pm to 6:20pm EDT June 20.

She seemed to think it was a long window, but I was skeptical since this is a planetary mission.

Jim...6:05pm June 20?


Yes. As of Dec 2006
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Jim from NSF.com
post Mar 26 2007, 03:02 PM
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QUOTE (ugordan @ Mar 26 2007, 08:43 AM) *
Is the 1 second launch window a consequence of LV flexibility or simply a tight performance constraint?


LV flexibility. Delta II can't yaw steer or do variable azimuths ( only 2 discrete ones per day)
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BPCooper
post Mar 30 2007, 11:58 PM
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The launch has been postponed to June 30 NET.

And as I had been told, there is in fact a launch window. It's about 20 mins long.


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