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Author Topic: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010  (Read 239904 times)

Offline Fuji

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #240 on: 06/11/2010 02:43 am »
IKAROS successfully deploys sail!
The Small Solar Power Sail Demonstrator “IKAROS” launched by the H-IIA F17 began to deploy its sail on June 3 (Japan Standard Time, JST,) and on June 10 (JST,) about 7.7 million km from the Earth, JAXA confirmed the proper extension of the sail and power generation by the thin film solar cells.
We will continue to measure the power generation status of the cells attached to the sail, and will verify acceleration by the cells and orbit control by their acceleration.

Press release (English version).
http://www.jaxa.jp/press/2010/06/20100611_ikaros_e.html
« Last Edit: 06/11/2010 12:18 pm by Fuji »
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Offline Robotbeat

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #241 on: 06/11/2010 02:46 am »
Second stage deployment complete!
Quote
The Small Solar Power Sail Demonstrator "IKAROS" launched by the H-IIA F17 began to deploy its sail on June 3 (Japan Standard Time, JST,) and on June 10 (JST,) about 7.7 million km from the Earth, JAXA confirmed the proper extension of the sail and power generation by the thin film solar cells.
http://www.jaxa.jp/countdown/f17/index_e.html

 Wooo!!!
That's wonderful! power generation by thin-film solar cells, too, with a gossamer-thin deployment method! That means solar arrays with a specific power of 1000+W/kg are feasible (though this was more like 600-800W/kg if they covered the whole thing with these same thin-film solar cells, since these cells are less efficient than other comparable thin-film cells at only 5% efficiency).

Congratulation, IKAROS team, on acheiving minimum success criteria!

Here's the full press release (in Japanese):
http://www.jaxa.jp/press/2010/06/20100611_ikaros_j.html
And the Google translation into English:
http://translate.google.com/translate?hl=en&sl=ja&u=http://www.jaxa.jp/press/2010/06/20100611_ikaros_j.html&ei=5qIRTKe_EMiTnQf4sb2RAw&sa=X&oi=translate&ct=result&resnum=1&ved=0CBUQ7gEwAA&prev=/search%3Fq%3Dhttp://www.jaxa.jp/press/2010/06/20100611_ikaros_j.html%26hl%3Den
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Offline TheFallen

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #242 on: 06/11/2010 05:52 am »
All that needs to be done now is for IKAROS to deploy those two free-floating cameras and photograph the sail in all its beauty :)
« Last Edit: 06/11/2010 05:55 am by TheFallen »
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Offline Fuji

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #243 on: 06/11/2010 12:28 pm »
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Offline TheFallen

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #244 on: 06/12/2010 06:18 pm »
I hope they deploy that free-floating camera soon.  Totally looking forward to seeing IKAROS in all its kite-shaped beauty

http://www.isas.jaxa.jp/home/IKAROS-blog/index.php?itemid=595
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Offline TheFallen

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #245 on: 06/14/2010 07:53 am »
Looks like the first of two free-floating cameras (DCAM 2) will be deployed from IKAROS today

http://www.isas.jaxa.jp/home/IKAROS-blog/?itemid=629
« Last Edit: 06/14/2010 08:02 am by TheFallen »
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Offline Fuji

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #246 on: 06/14/2010 12:41 pm »
Quote from: TheFallen on 06/14/2010 07:53 am
Looks like the first of two free-floating cameras (DCAM 2) will be deployed from IKAROS today

http://www.isas.jaxa.jp/home/IKAROS-blog/?itemid=629

DCAM 2 was deployd and transmit the photo data.
DCAM is battery powerd, so operation is already end. World smallest interplanetary satellite. (Next will be DCAM 1 deploy)
DCAM 2 photo data was transmit to the Ikaros and relayed to downlink.
These photo data will be recieved and prosessed 1 to 2 days.
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Online Silmfeanor

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #247 on: 06/14/2010 12:43 pm »
Quote from: Fuji on 06/14/2010 12:41 pm
Quote from: TheFallen on 06/14/2010 07:53 am
Looks like the first of two free-floating cameras (DCAM 2) will be deployed from IKAROS today

http://www.isas.jaxa.jp/home/IKAROS-blog/?itemid=629

DCAM 2 was deployd and transmit the photo data.
DCAM is battery powerd, so operation is already end. World smallest interplanetary satellite. (Next will be DCAM 1 deploy)
DCAM 2 photo data was transmit to the Ikaros and relayed to downlink.
These photo data will be recieved and prosessed 1 to 2 days.

Wow, thanks for this information!

I wonder, from how far away does this mini-probe take a picture? and from what corner / point of view?
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Offline TheFallen

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #248 on: 06/14/2010 07:25 pm »
Quote from: Fuji on 06/14/2010 12:41 pm
Quote from: TheFallen on 06/14/2010 07:53 am
Looks like the first of two free-floating cameras (DCAM 2) will be deployed from IKAROS today

http://www.isas.jaxa.jp/home/IKAROS-blog/?itemid=629

DCAM 2 was deployd and transmit the photo data.
DCAM is battery powerd, so operation is already end. World smallest interplanetary satellite. (Next will be DCAM 1 deploy)
DCAM 2 photo data was transmit to the Ikaros and relayed to downlink.
These photo data will be recieved and prosessed 1 to 2 days.

1 or 2 days?  But I want it NOW!!  I kid ;D

Anyways, DCAM 2 (and 1) are deployed from the front (Sun-facing side) of IKAROS... If things worked as plan, the camera should've taken images up to a distance where it captured a full shot of the solar sail.
« Last Edit: 06/14/2010 08:36 pm by TheFallen »
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Offline Ben the Space Brit

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #249 on: 06/14/2010 08:27 pm »
Quote from: Fuji on 06/11/2010 02:43 am
IKAROS successfully deploys sail!

Well done to the IKAROS team and all the people at JAXA for their work on this project! Another step closer to the dream of Arthur C Clarke!
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Offline jcm

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #250 on: 06/14/2010 09:46 pm »
Does anyone know mass and size of the DCAM subsatellites?
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Offline Fuji

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #251 on: 06/14/2010 11:59 pm »
Quote from: jcm on 06/14/2010 09:46 pm
Does anyone know mass and size of the DCAM subsatellites?


Photo of the DCAM are here. very tiny subsatellites.
http://forum.nasaspaceflight.com/index.php?topic=18950.msg592901#msg592901

2nd photo shows size comparison Ikaros and DCAM ;)
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Offline Fuji

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #252 on: 06/16/2010 01:23 am »
Finally, DCAM 2 photo released in the Japanese press release.
(English version will be issued later)
http://www.jaxa.jp/press/2010/06/20100616_ikaros_j.html
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Offline Robotbeat

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #253 on: 06/16/2010 01:27 am »
Quote from: Fuji on 06/16/2010 01:23 am
Finally, DCAM 2 photo released in the Japanese press release.
(English version will be issued later)
http://www.jaxa.jp/press/2010/06/20100616_ikaros_j.html
Cool!
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Offline jcm

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #254 on: 06/16/2010 04:31 am »
Quote from: Fuji on 06/14/2010 11:59 pm
Quote from: jcm on 06/14/2010 09:46 pm
Does anyone know mass and size of the DCAM subsatellites?


Photo of the DCAM are here. very tiny subsatellites.
http://forum.nasaspaceflight.com/index.php?topic=18950.msg592901#msg592901

2nd photo shows size comparison Ikaros and DCAM ;)

OK, so 6 cm in size and maybe I'm guessing half a kilo.
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Online Silmfeanor

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #255 on: 06/16/2010 10:27 am »
Quote from: Fuji on 06/16/2010 01:23 am
Finally, DCAM 2 photo released in the Japanese press release.
(English version will be issued later)
http://www.jaxa.jp/press/2010/06/20100616_ikaros_j.html

That looks just so awesome. Thanks!
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Offline Fuji

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #256 on: 06/16/2010 11:59 am »
English press release was released.
Small Solar Power Sail Demonstrator 'IKAROS' Successful Image Shooting by Separation Camera
http://www.jaxa.jp/press/2010/06/20100616_ikaros_e.html


More photos here (but Japanese). It's great.
http://www.jspec.jaxa.jp/ikaros_channel/bn006.html

DCAM operatinal time is 15 minutes (Due to battery life).
« Last Edit: 06/16/2010 12:03 pm by Fuji »
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Offline Norm Hartnett

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #257 on: 06/17/2010 12:07 am »
Lovely video that shows planned operations of IKAROS. Some nice detail of planned maneuvering techniques towards the end.

http://www.youtube.com/watch?v=7_6HOqBkP2o...player_embedded
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Offline TheFallen

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #258 on: 06/17/2010 06:27 pm »
IKAROS' spin rate has decreased from 2.5 rpm to 1.1 rpm to allow better stability of the sail membrane as it gets tested for attitude control

http://www.isas.jaxa.jp/home/IKAROS-blog/
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Offline TheFallen

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Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #259 on: 06/18/2010 06:40 pm »
Hm. I thought DCAM1 was already jettisoned... I guess not

http://www.isas.jaxa.jp/home/IKAROS-blog/?itemid=646

Since IKAROS is spinning at only 1.1 rpm, I would assume the deployment of DCAM1 will be much more stable than that of DCAM2...and that IKAROS will be better framed (much more centered) in the DCAM1 images this time around
« Last Edit: 06/18/2010 06:44 pm by TheFallen »
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