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

Offline Fuji

  • Full Member
  • ****
  • Posts: 1194
  • Japan
  • Liked: 159
  • Likes Given: 11
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 »

Offline Robotbeat

  • Senior Member
  • *****
  • Posts: 28825
  • Minnesota
  • Liked: 8974
  • Likes Given: 5773
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
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 TheFallen

  • Full Member
  • ****
  • Posts: 802
  • Liked: 76
  • Likes Given: 159
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 »


Offline TheFallen

  • Full Member
  • ****
  • Posts: 802
  • Liked: 76
  • Likes Given: 159
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

Offline TheFallen

  • Full Member
  • ****
  • Posts: 802
  • Liked: 76
  • Likes Given: 159
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 »

Offline Fuji

  • Full Member
  • ****
  • Posts: 1194
  • Japan
  • Liked: 159
  • Likes Given: 11
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.

Online Silmfeanor

  • Full Member
  • ****
  • Posts: 1196
  • Utrecht, The Netherlands
  • Liked: 260
  • Likes Given: 538
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?

Offline TheFallen

  • Full Member
  • ****
  • Posts: 802
  • Liked: 76
  • Likes Given: 159
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 »

Offline Ben the Space Brit

  • Senior Member
  • *****
  • Posts: 7157
  • A spaceflight fan
  • London, UK
  • Liked: 669
  • Likes Given: 786
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!
"Oops! I left the silly thing in reverse!" - Duck Dodgers

~*~*~*~

The Space Shuttle Program - 1981-2011

The time for words has passed; The time has come to put up or shut up!
DON'T PROPAGANDISE, FLY!!!

Offline jcm

  • Senior Member
  • *****
  • Posts: 3062
  • Jonathan McDowell
  • Somerville, Massachusetts, USA
    • Jonathan's Space Report
  • Liked: 604
  • Likes Given: 447
Does anyone know mass and size of the DCAM subsatellites?
-----------------------------

Jonathan McDowell
http://planet4589.org

Offline Fuji

  • Full Member
  • ****
  • Posts: 1194
  • Japan
  • Liked: 159
  • Likes Given: 11
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 ;)

Offline Fuji

  • Full Member
  • ****
  • Posts: 1194
  • Japan
  • Liked: 159
  • Likes Given: 11
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

Offline Robotbeat

  • Senior Member
  • *****
  • Posts: 28825
  • Minnesota
  • Liked: 8974
  • Likes Given: 5773
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!
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

  • Senior Member
  • *****
  • Posts: 3062
  • Jonathan McDowell
  • Somerville, Massachusetts, USA
    • Jonathan's Space Report
  • Liked: 604
  • Likes Given: 447
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.
-----------------------------

Jonathan McDowell
http://planet4589.org

Online Silmfeanor

  • Full Member
  • ****
  • Posts: 1196
  • Utrecht, The Netherlands
  • Liked: 260
  • Likes Given: 538
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!

Offline Fuji

  • Full Member
  • ****
  • Posts: 1194
  • Japan
  • Liked: 159
  • Likes Given: 11
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 »

Offline Norm Hartnett

  • Elite Veteran
  • Senior Member
  • *****
  • Posts: 2306
  • Liked: 56
  • Likes Given: 2
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
“You can’t take a traditional approach and expect anything but the traditional results, which has been broken budgets and not fielding any flight hardware.” Mike Gold - Apollo, STS, CxP; those that don't learn from history are condemned to repeat it: SLS.

Offline TheFallen

  • Full Member
  • ****
  • Posts: 802
  • Liked: 76
  • Likes Given: 159
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/

Offline TheFallen

  • Full Member
  • ****
  • Posts: 802
  • Liked: 76
  • Likes Given: 159
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 »

Tags: