Author Topic: JWSTelescope  (Read 7164 times)

Beardy

  • Shedist
Re: JWST
« Reply #25 on: 26 December, 2021, 06:26:22 pm »
And there’s a lot of it for something to go wrong. It’s not as if they had the luxury of designing in redundancy given the payload restrictions.
For every complex problem in the world, there is a simple and easily understood solution that’s wrong.

Re: JWST
« Reply #26 on: 27 December, 2021, 12:51:16 am »
Scope for unpredictable failure conditions too with an Xmas day launch:

T42

  • Apprentice geezer
Re: JWST
« Reply #27 on: 27 December, 2021, 09:21:13 am »
I've dusted off all those old bottles and set them up straight

woollypigs

  • Mr Peli
    • woollypigs
Re: JWST
« Reply #28 on: 28 December, 2021, 11:16:17 am »
Current mood: AARRRGGGGHHHHH !!! #bollockstobrexit

Re: JWST
« Reply #29 on: 28 December, 2021, 11:47:31 am »
^ :thumbsup:

quixoticgeek

  • Mostly Harmless
Re: JWST
« Reply #30 on: 28 December, 2021, 11:49:32 am »


I have an ESA branded "remove before launch" tag I was given by one of the ground control crew from the ISS.

The space stuff all has before launch, not before flight...

J
--
Beer, bikes, and backpacking
http://b.42q.eu/

quixoticgeek

  • Mostly Harmless
Re: JWST
« Reply #31 on: 28 December, 2021, 11:55:57 am »





J
--
Beer, bikes, and backpacking
http://b.42q.eu/

T42

  • Apprentice geezer
Re: JWST
« Reply #32 on: 29 December, 2021, 04:25:48 pm »
Looks like sunshield deployment has been at least partially successful: the status page is showing large temperature differences between cold & hot sides.
I've dusted off all those old bottles and set them up straight

Re: JWST
« Reply #33 on: 29 December, 2021, 04:35:45 pm »
And that's before the sunshield is fully deployed. They're still folded up and not due to be stretched out in place until Day 6, and then fully tensioned on Day 7.
Rust never sleeps

Pingu

  • Put away those fiery biscuits!
  • Mrs Pingu's domestique
    • the Igloo


rogerzilla

  • When n+1 gets out of hand
Re: JWST
« Reply #36 on: 29 December, 2021, 05:39:12 pm »
Beyond the moon, -150 deg C, and cruising at 2,000mph.  That's worse than the BCM audax.
Hard work sometimes pays off in the end, but laziness ALWAYS pays off NOW.

Re: JWST
« Reply #37 on: 29 December, 2021, 06:39:45 pm »





J
So cool.
I want.
It makes my 'Remove before flight' tags pale into insignificance.

Kim

  • Timelord
    • Fediverse
Re: JWST
« Reply #38 on: 29 December, 2021, 08:24:09 pm »
JWST status page:

https://www.jwst.nasa.gov/content/webbLaunch/whereIsWebb.html


For sensible units: https://www.jwst.nasa.gov/content/webbLaunch/whereIsWebb.html?units=metric

...with improbable accuracies  ::-)

I bet the sensors are reading in Celsius/Kelvin and it's being converted from degrees SCIENCE to degrees Frankenstein and back.

Re: JWST
« Reply #39 on: 29 December, 2021, 08:34:34 pm »
JWST status page:

https://www.jwst.nasa.gov/content/webbLaunch/whereIsWebb.html


For sensible units: https://www.jwst.nasa.gov/content/webbLaunch/whereIsWebb.html?units=metric

...with improbable accuracies  ::-)

I bet the sensors are reading in Celsius/Kelvin and it's being converted from degrees SCIENCE to degrees Frankenstein and back.

Probably mV, mA or something like that.

It just bugged me that the temperatures were quoted in integer degF (but to two DP  ::-)) then converted to degC with the same 2DP.

Kim

  • Timelord
    • Fediverse
Re: JWST
« Reply #40 on: 29 December, 2021, 08:45:54 pm »
I squinted at the page source to see if it was doing the conversion in the browser, and now I wish I hadn't.

Jaded

  • The Codfather
  • Formerly known as Jaded
Re: JWSTelescope
« Reply #41 on: 30 December, 2021, 12:16:10 pm »
It is 389k miles away now, and some kind of little separation tower is deployed.
It is simpler than it looks.

Pingu

  • Put away those fiery biscuits!
  • Mrs Pingu's domestique
    • the Igloo
Re: JWSTelescope
« Reply #42 on: 30 December, 2021, 07:21:58 pm »
Sunshield covers released.

Zed43

  • prefers UK hills over Dutch mountains
Re: JWSTelescope
« Reply #43 on: 30 December, 2021, 07:33:51 pm »
JWST is now expected to have a 10+ year lifespan due to the precision of the Arianespace Ariane 5 launch, which exceeded the requirements needed to put Webb on the right path.

quixoticgeek

  • Mostly Harmless
Re: JWSTelescope
« Reply #44 on: 30 December, 2021, 07:36:48 pm »
JWST is now expected to have a 10+ year lifespan due to the precision of the Arianespace Ariane 5 launch, which exceeded the requirements needed to put Webb on the right path.

This is excellent news. I'm still holding out hope that they come up with a robotic refueling mission.

J
--
Beer, bikes, and backpacking
http://b.42q.eu/

Re: JWSTelescope
« Reply #45 on: 03 January, 2022, 03:52:32 pm »
Does anyone know why the sunshield tensioning has been re-scheduled ?
Rust never sleeps

Pingu

  • Put away those fiery biscuits!
  • Mrs Pingu's domestique
    • the Igloo

Re: JWSTelescope
« Reply #47 on: 03 January, 2022, 04:56:48 pm »
Aha !   Thank you.
Rust never sleeps

Re: JWST
« Reply #48 on: 03 January, 2022, 07:17:57 pm »
I bet the sensors are reading in Celsius/Kelvin and it's being converted from degrees SCIENCE to degrees Frankenstein and back.

TIL: according to that website, the opposite of "Metric" is "English"  :facepalm:

TI actually L: I was wondering whether it was getting a bit crowded at the L2 "point" and how big a point it actually is, but it turns out that the various telescopes do not just orbit the sun but also orbit the L2 point. How they orbit something that's not actually there and so doesn't have any gravity is some kind of magic to do with gravitational wells or something.
Quote from: tiermat
that's not science, it's semantics.

Cudzoziemiec

  • Ride adventurously and stop for a brew.
Re: JWSTelescope
« Reply #49 on: 03 January, 2022, 08:23:22 pm »
"English" seems a sensible term in that context. They don't want to use "Imperial" because they're American (and if they gave measurements of volume or weight, "Imperial" would be incorrect anyway), and they don't want to use "US customary measures" because they're aware that they have an international audience. But the three countries which don't officially use metric measures all speak English to some degree, and the vast majority of people choosing to see miles and fahrenheit will be English speakers.
Riding a concrete path through the nebulous and chaotic future.