Author Topic: Atlas V 551 : Kuiper KA-01 : CCSFS SLC-41 : 28 April 2025 (23:00 UTC)  (Read 44277 times)

Offline Asteroza

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So, having dispensers like this one shown, what can one assume is the shape of the packaged sat?

More or less a square or rectangular? The dispenser obviously looks more like what SX uses for its Transporter delivery system (mostly cubesats, or something similar in shape) than for its Starlink sats.

I remember seeing the boxes the test kuipers came in, and they suggested more square or cube type vehicles.

One wonders then why SX has migrated to flatpack; possibly because they are more easily handled and more can be carried within such a volume?

SpaceX flatpack came when the Starlink team got fired for being slow (and many of those fired team members ended up at Kuiper). Flatpack does avoid some deployer mass, but at its core tenet the phased array antenna is the most important aspect of the sat and needs the most area. If you want a non-folding phased array, that's really the only way to increase the area of one dimension easily. Having the array upright introduces other inconveniences in design.

We know from OneWeb and Iridium designs that trapezoidal cross section sats pack tighter around a central deployer column style so it may be that, otherwise fairly rectangular. This assumes no big deployable antennas, such as a folding phased array similar to SAR sats, or a large deployable reflector of some kind.

There was a novel Blue Origin patent for a clipped diamond style flatpack sat allowing three sats per layer, but that's unlikely to fly with this deployer.

Offline Steven Pietrobon

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Beyond Gravity hands over first dispenser tier module to Amazon

Your images are .webp files that have been incorrectly labelled as .jpg. Attached are the images converted to proper .jpg files.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline zubenelgenubi

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Cross-post:
Quote from: Tory Bruno tweet
Yesterday I shared a flock of Centaur IIIs. Here’s a herd of Atlas’. #CrowdedFactory
Interesting reply tweets
<snip>
https://twitter.com/torybruno/status/1792299526230802773
Quote
Can you reveal when Atlas V launch Kuiper will use which length fairing?
Quote from: Tory Bruno tweet
We use our long fairings for that mission.
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Offline GewoonLukas_

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Quote
Amazon's launch of its first operational satellites will be "in the coming months," a spokesperson says

https://twitter.com/joroulette/status/1793654976994025589
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Offline StraumliBlight

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Project Kuiper update

Quote
We expect to ship our first completed production satellites this summer, and we’re targeting our first full-scale Kuiper mission for Q4 aboard an Atlas V rocket from ULA.

Offline zubenelgenubi

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Busy fourth quarter at SLC-41:
Project Kuiper update

Quote
We expect to ship our first completed production satellites this summer, and we’re targeting our first full-scale Kuiper mission for Q4 aboard an Atlas V rocket from ULA.

Quote
United Launch Alliance Successfully Launches 100th National Security Mission
July 30, 2024
[...]
ULA’s next launch is the second certification flight (Cert-2) of the Vulcan rocket from Cape Canaveral Space Force Station, Florida [currently Sep 16]. Vulcan will also launch USSF-106 and USSF-87, two critical NSS missions, to orbit later this year. 
« Last Edit: 02/27/2025 12:00 am by zubenelgenubi »
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Offline zubenelgenubi

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Cross-post:
https://twitter.com/jeff_foust/status/1841557509133480088
Quote
A couple notes from today's ULA Cert-2 briefing:
- ULA still expects to launch USSF-106 and 87 missions (first national security Vulcan flights) this year, assuming Cert-2 goes well;
- 20 launches next year, split  half-and-half between Atlas and Vulcan;
- first Atlas 5 Kuiper launch slips to early next year;
- room in the manifest next year for Dream Chaser, but no date set yet.
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Offline GewoonLukas_

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Tory confirmed on BlueSky today that their next launch will be an Atlas V (probably this one given the lack of updates on ViaSat-3 F2):

Quote
Hi Tory! When we launching the next bird?
https://bsky.app/profile/cosmic-andrew1.bsky.social/post/3lfuksgzcos2d
Quote
Very soon
https://bsky.app/profile/torybruno.bsky.social/post/3lfuqkvw7wk2m
Quote
Atlas or Vulcan?
https://bsky.app/profile/gewoonlukas.bsky.social/post/3lgcqhoob7s2c
Quote
Atlas
https://bsky.app/profile/torybruno.bsky.social/post/3lh2hko5u4c2q

Also, the official ULA designation for this launch is KA-01
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Offline zubenelgenubi

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How many satellites will be carried on the dispenser?
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Offline GWR64

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https://twitter.com/amazon/status/1882844628745170992

Quote
Amazon
@amazon
🚨🛰 Project Kuiper update! Another batch of production satellites for our low Earth orbit internet constellation is on its way to Cape Canaveral, FL. These satellites, built to withstand the harsh conditions of space and the journey there, will be processed upon arrival to get them ready for launch.

Before shipping these satellites, we put each one through a series of tests that include:

💪 Performance testing in a vacuum chamber to replicate outer space
🔊Vibration and acoustic testing to simulate rocket launch conditions
🔃 Thermal heating and cooling cycles that simulate temperature changes the satellites will experience in space

These satellites will bring fast, reliable internet to customers even in remote areas. Stay tuned for our first launch this year.

6:35 PM · Jan 24, 2025
« Last Edit: 02/01/2025 09:37 pm by GWR64 »

Offline seb21051

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How many satellites will be carried on the dispenser?

Well, if they weight in at 700kg (my estimate), then 25-27. AFAIK the Atlas V can lift  around 18,850kg to LEO.
« Last Edit: 02/02/2025 04:25 am by seb21051 »

Offline zubenelgenubi

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NextSpaceflight; updated January 31?:
Launch NET Q1
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Online Robert_the_Doll

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How many satellites will be carried on the dispenser?

Well, if they weight in at 700kg (my estimate), then 25-27. AFAIK the Atlas V can lift  around 18,850kg to LEO.

Officially, 31 can be carried at a time on Atlas 551.

- 35-40 can fly on Ariane 6

- 45 on Vulcan

- 61 on New Glenn.

Offline russianhalo117

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How many satellites will be carried on the dispenser?

Well, if they weight in at 700kg (my estimate), then 25-27. AFAIK the Atlas V can lift  around 18,850kg to LEO.

Officially, 31 can be carried at a time on Atlas 551.

- 35-40 can fly on Ariane 6

- 45 on Vulcan

- 61 on New Glenn.
I take that to be 35 on A64 and 40 on A64+.

Online DanClemmensen

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How many satellites will be carried on the dispenser?

Well, if they weight in at 700kg (my estimate), then 25-27. AFAIK the Atlas V can lift  around 18,850kg to LEO.

Officially, 31 can be carried at a time on Atlas 551.

- 35-40 can fly on Ariane 6

- 45 on Vulcan

- 61 on New Glenn.
They contracted for 3 F9 launches also. How many on an F9?

Offline FutureSpaceTourist

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This is now the next ULA flight:

https://twitter.com/spaceflightnow/status/1887938076103852527

Quote
New: @ulalaunch is de-stacking its Vulcan rocket and is now aiming to launch an Atlas V rocket as its first mission of 2025. This will be the Kuiper-1 mission, the first launch of production satellites for @amazon's Project Kuiper internet constellation.

Read more: https://spaceflightnow.com/2025/02/07/ula-begins-de-stacking-vulcan-rocket-pivots-to-atlas-5-launch-of-amazons-kuiper-satellites-for-first-2025-mission/

📸: Amazon

From ULA:

Quote
“The big thing with the [USSF-106] destack is it’s really demonstrating the flexibility that we’ll have going forward to be able to pivot from Atlas to Vulcan back and forth in Lane-G, the traditional government lane,”
« Last Edit: 02/07/2025 08:33 pm by zubenelgenubi »

Offline Starshipdown

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How many satellites will be carried on the dispenser?

Well, if they weight in at 700kg (my estimate), then 25-27. AFAIK the Atlas V can lift  around 18,850kg to LEO.

Officially, 31 can be carried at a time on Atlas 551.

- 35-40 can fly on Ariane 6

- 45 on Vulcan

- 61 on New Glenn.
I take that to be 35 on A64 and 40 on A64+.

A64 and the P160-powered Block 2 upgrade. It also depends on which of the 98 orbital planes and three orbital layers; 590 km, 610 km and 630 km altitude the particular batch of satellites are to go to.

Offline zubenelgenubi

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How many satellites will be carried on the dispenser?

SFN ULA begins de-stacking Vulcan rocket, pivots to Atlas 5 launch of Amazon’s Kuiper satellites for first 2025 mission Feb 7, Will Robinson-Smith
Quote
During an interview with a few reporters in January 2024, Bruno said an Atlas 5 rocket is capable of launching 27 Kuiper satellites compared to 45 on Vulcan.

Amazon hasn’t specified how many satellites it plans to launch on the Kuiper-1 mission. In late January [Jan 24], the company announced on social media that “another batch” of its production satellites was “on its way to Cape Canaveral.”
27
« Last Edit: 02/09/2025 04:32 pm by zubenelgenubi »
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Offline GewoonLukas_

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ULA has published their mission page for this launch: https://www.ulalaunch.com/missions/next-launch/atlas-v-kuiper-1
Lukas C. H. • Hobbyist Mission Patch Artist 🎨 • May the force be with you my friend, Ad Astra Per Aspera ✨️

Offline StraumliBlight

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