IKAROS JAXA Solar Sail mission |
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IKAROS JAXA Solar Sail mission |
 Jul 13 2010, 11:46 AM
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#76
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 Senior Member  Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004  |
At last a release in English: http://www.jaxa.jp/press/2010/07/20100709_ikaros_e.html
-------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Jul 14 2010, 08:54 AM
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#77
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Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
Meanwhile, IKAROS is also doing some science. There is a release today (in Japanese) about the first gamma-ray burst detection
-------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Jul 19 2010, 01:18 AM
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#78
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Junior Member Group: Members Posts: 53 Joined: 12-November 06 Member No.: 1354 |
Some gems about the possible future of IKAROS from The Mainichi Daily News http://mdn.mainichi.jp/mdnnews/news/201007...0na012000c.html
QUOTE The cellophane-like film of the sail is made of the same materials used for the electronic substrate of mobile phones, and it boasts an expected operational life of over 10 years even as it is exposed to strong radiation in space. QUOTE By the time IKAROS has approached Venus in six months, all the necessary experiments will have been completed, and the spacecraft will start orbiting between Earth and Venus without need for refueling.
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Jul 23 2010, 05:18 AM
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#79
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Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
Apparently the solar radiation pressure attitude control experiment was successful! we have a true solar sail out there!
release (in Japanese only at the moment): http://www.jaxa.jp/press/2010/07/20100723_ikaros_j.html -------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Jul 31 2010, 06:30 PM
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#80
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Junior Member Group: Members Posts: 53 Joined: 12-November 06 Member No.: 1354 |
Solar Distance : 1.05AU
Earth Distance : 26105537km, ascension =- 141.2 °, declination =- 26.2 ° Venus Distance : 0.75AU Attitude : spin rate = 1.5rpm, sun angle 22.4deg For the last few days IKAROS was spun back down and the solar angle increased as JAXA continues to investigate sail trimming. Experiments in ranging are on going and increased emphisis is being given to acceleration. Since the 24th of July all attitude control is being handled by the RCD (LCD panels), a truely stunning breakthrough in propellantless deep space navigation. |
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Aug 26 2010, 07:51 AM
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#81
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 Member Group: Members Posts: 515 Joined: 25-October 05 From: California Member No.: 535 |
According to this animated image, IKAROS will arrive at Venus on December 18 (Japan time)...11 days after Akatsuki does
http://twitpic.com/2g57yr/full -------------------- 2011 JPL Tweetup photos: http://www.rich-parno.com/aa_jpltweetup.html
http://human-spaceflight.blogspot.com |
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Aug 27 2010, 01:34 AM
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#82
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Junior Member Group: Members Posts: 53 Joined: 12-November 06 Member No.: 1354 |
8 / 26 IKAROS
Solar Distance : 1.00AU Earth Distance : 31401035km, ascension =- 130.8 °, declination =- 28.0 ° Venus Distance : 0.48AU Attitude : spin rate = 1.3rpm, sun angle = 26.0deg IKAROS has crossed Earth's orbit and is headed Sunward. The last few weeks have seen experiments with rotation rates going up to 2.0rpm and back down and sun angles reaching as high as 32.2 degrees. From punkboi's post above it appears that IKAROS will be passing Venus on the "outside" as would be expected since it has been increasing its orbital speed since deployment. 
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 Sep 9 2010, 07:00 PM
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#83
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Junior Member Group: Members Posts: 53 Joined: 12-November 06 Member No.: 1354 |
 QUOTE Soon , no communication zone . Set IKAROS autonomous operation is almost complete . IKAROS to the upper surface of the earth is soon found success with . (Y) 9 / 9 IKAROS Solar Distance : 0.96AU Earth Distance : 32181854km, ascension =- 126.3 °, declination =- 28.5 ° Venus Distance : 0.35AU Attitude : spin rate = 1.4rpm, sun angle = 29.9deg I think this means that due to the angle of IKAROS vs location of the Earth IKAROS is losing com. Also they seem to be having troubles at their ground stations. I have seen no comments on when they expect to regain communications. Does anyone (Emily?) have any further information? |
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Sep 9 2010, 07:06 PM
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#84
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 Bloggette par Excellence Group: Admin Posts: 3962 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I actually just sent an email to a Japanese contact about this today. I can't quite figure out what these updates mean. I'll post a blog entry if I learn anything.
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Sep 9 2010, 10:22 PM
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#85
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Bloggette par Excellence Group: Admin Posts: 3962 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Aha, it's not as bad as it seems. The problem is that Earth is passing through the sail plane, which is apparently a blind horizon for radio comms. Once Earth has gone through the sail plane to the other side, comms should resume. Today, Earth is within 13 degrees of the sail plane. IKAROS is being configured for autonomous operation during the communications blackout.
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 Sep 10 2010, 05:50 AM
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#86
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Junior Member Group: Members Posts: 53 Joined: 12-November 06 Member No.: 1354 |
Thanks Ms. E.
I was pretty sure that things weren't as bad as my worry wart self  thought but my confident self just could not sort out the good data from the noise.(Nice rant today BTW) |
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Sep 19 2010, 05:03 PM
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#87
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Junior Member Group: Members Posts: 53 Joined: 12-November 06 Member No.: 1354 |
QUOTE In today's operation , IKAROS able to successfully communicate with ! While the folks running IKAROS were acting fairly confident about the four day communications blackout, their relief and joy as IKAROS reestablished com was evident in the 9-18 Blog entry. http://www.isas.jaxa.jp/home/IKAROS-blog/?blogid=12  9 / 18 IKAROS Solar Distance : 0.94AU Earth Distance : 31844918km, ascension =- 124.5 °, declination =- 28.5 ° Venus Distance : 0.34AU Attitude : spin rate = 1.3rpm, sun angle = 29.0deg |
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Oct 10 2010, 04:11 PM
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#88
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Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
The October issue of the French magazine "l'Astronomie" (http://www.saf-lastronomie.com/revue/index.html) has a very interesting article on a French radio-ham who managed to receive the signal from Ikaros during June using a 3.5 m parabola.
unfortunately I don't have a scanner at hand... -------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Oct 10 2010, 04:57 PM
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#89
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 Administrator Group: Chairman Posts: 13231 Joined: 8-February 04 Member No.: 1 |
Good old Amatuer DSN guys. There's a ham radio group in Germany with a dish that would rival the smaller dishes of the DSN itself.
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Oct 11 2010, 05:35 PM
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#90
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Senior Member Group: Members Posts: 1146 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
A report by the French radio ham is available here
-------------------- I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.
James Van Allen |
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Lo-Fi Version | Time is now: 20th May 2013 - 05:55 AM |
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