Topic Actions

Topic Search

Who is online

Users browsing this forum: No registered users and 5 guests

JWST - mid deploy; in Halo orbit & 3D model

For anyone who might want to have a side conversation...you're welcome here!
JWST - mid deploy; in Halo orbit & 3D model
Post by isaac_newton   » Thu Dec 30, 2021 4:43 pm

isaac_newton
Rear Admiral

Posts: 1175
Joined: Fri Oct 18, 2013 6:37 am
Location: Brighton, UK

Its been fascinating keeping an eye on the James Webb progress.

[At present just about 5 days 8 hours from launch] and in the very middle of the heat shied deployment - this seems to be one of the most critical steps.

BTW there is a nice NASA dashbord giving current distances and speeds here https://jwst.nasa.gov/content/webbLaunc ... sWebb.html

also a v good video on the deployment process https://webbtelescope.org/webb-science/the-observatory

[edit] the video is about the middle of the page.
Also the deployment did not actually start till several days later
Last edited by isaac_newton on Mon Jan 31, 2022 5:10 pm, edited 3 times in total.
Top
Re: James Webb space telescope - mid deployment
Post by isaac_newton   » Fri Dec 31, 2021 7:14 am

isaac_newton
Rear Admiral

Posts: 1175
Joined: Fri Oct 18, 2013 6:37 am
Location: Brighton, UK

I just found a old video of a test deployment - literally hand cranked!!
https://www.youtube.com/watch?v=7DQe-Oz ... YaoNQwk4Bw
Top
Re: James Webb space telescope - mid deployment
Post by isaac_newton   » Fri Dec 31, 2021 8:35 pm

isaac_newton
Rear Admiral

Posts: 1175
Joined: Fri Oct 18, 2013 6:37 am
Location: Brighton, UK

almost exactly at half way, and NASA have [finally] reported that one boom is extended - seems to have been soem sensor issues causing the delay :? :shock:

[Edit on monday 4th] sunshield seployment proceeding well. Three of the five layers have been tensioned - two to go.

Once the shield is completely tensioned at all five layers, they say that about 75% of the single point failure 'opportunities' will be safely passed.
Top
Re: James Webb space telescope - mid deployment
Post by Louis R   » Wed Jan 05, 2022 12:21 am

Louis R
Rear Admiral

Posts: 1276
Joined: Thu Jan 01, 2015 9:25 pm

Sky and Telescope is reporting that the sun shield is fully tensioned. So that hurdle has been cleared.

isaac_newton wrote:almost exactly at half way, and NASA have [finally] reported that one boom is extended - seems to have been soem sensor issues causing the delay :? :shock:

[Edit on monday 4th] sunshield seployment proceeding well. Three of the five layers have been tensioned - two to go.

Once the shield is completely tensioned at all five layers, they say that about 75% of the single point failure 'opportunities' will be safely passed.
Top
Re: James Webb space telescope - mid deployment
Post by isaac_newton   » Wed Jan 05, 2022 11:19 am

isaac_newton
Rear Admiral

Posts: 1175
Joined: Fri Oct 18, 2013 6:37 am
Location: Brighton, UK

Just about to start deployment of the secondary mirror...

BTW the Nasa live TV shows the control room in real time [at least when it is doing a JWST transmission]
https://www.nasa.gov/nasalive

version on youtube is better I think
https://www.youtube.com/watch?v=21X5lGlDOfg

they also have a visualisation window which shows a 3D model whose positions are controlled by telemetry from JWST... [not quite as good as a live camera on the JWST :D

[Edit] - looking good - its deployed now
BTW they showed the live ground test of the deployment. Those arms are BIG - look like telegraph poles!!
Top
Re: James Webb space telescope - mid deployment
Post by Louis R   » Tue Jan 11, 2022 10:02 pm

Louis R
Rear Admiral

Posts: 1276
Joined: Thu Jan 01, 2015 9:25 pm

And S&T reported yesterday that the primary mirror is unfolded and locked in place. With that, the deployment phase is apparently finished. Now they move to commissioning.

isaac_newton wrote:Just about to start deployment of the secondary mirror...

BTW the Nasa live TV shows the control room in real time [at least when it is doing a JWST transmission]
https://www.nasa.gov/nasalive

version on youtube is better I think
https://www.youtube.com/watch?v=21X5lGlDOfg

they also have a visualisation window which shows a 3D model whose positions are controlled by telemetry from JWST... [not quite as good as a live camera on the JWST :D

[Edit] - looking good - its deployed now
BTW they showed the live ground test of the deployment. Those arms are BIG - look like telegraph poles!!
Top
Re: James Webb space telescope - mid deployment
Post by isaac_newton   » Sun Jan 30, 2022 4:58 pm

isaac_newton
Rear Admiral

Posts: 1175
Joined: Fri Oct 18, 2013 6:37 am
Location: Brighton, UK

Hah - NASA have provided a really neat 3D [rotates & zooms using mouse] model of JWST.

The JWST model is in turn embedded in the solar system, so you can see not just the standard planets, but also various asteroids, other probes and more good stuff.

The positions are real-time accurate - they called it a digital orrery - v neat indeed :D :geek: :D

https://jwst.nasa.gov/content/webbLaunc ... sWebb.html

[apparently there is a downloadable version with even more good stuff]
Top

Return to Free-Range Topics...