Author Topic: Starlink v2 mini satellites  (Read 67315 times)

Offline Asteroza

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Re: Starlink v2 mini satellites
« Reply #180 on: 09/05/2023 06:30 am »
I discounted it on 7-1 due to launch location.  But both East Coast facilities?  Six months of launches @ 22 and suddenly need more margin?

Whats interesting about 6-12 with only 21 V2 minis is it was flown by 1073. For some reason this particular booster has never flown the "max" number of starlinks to a particular shell. First launch it did 53 to Group 4, which was the max for a bit for Group 4 launches, but they were able to do max 54 towards the end of that shell. Then every other launch afterwards it was 52 sats for Group 4, 54 sats for Group 5, or 21 sats for Group 6, which are all lower then the max that was carried.

For those keeping track, does this particular booster's launches also correspond to short nozzle upper stages?

Offline Barley

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Re: Starlink v2 mini satellites
« Reply #181 on: 09/05/2023 01:23 pm »
I discounted it on 7-1 due to launch location.  But both East Coast facilities?  Six months of launches @ 22 and suddenly need more margin?
Sun spots?

Solar activity inflates the Earth's atmosphere, you need to get a little higher for a minimum orbit.

Currently we are two years before the next solar maximum around July 2025.  This means we are in the region of steepest increase.

Re: Starlink v2 mini satellites
« Reply #182 on: 09/05/2023 04:18 pm »
I discounted it on 7-1 due to launch location.  But both East Coast facilities?  Six months of launches @ 22 and suddenly need more margin?

Whats interesting about 6-12 with only 21 V2 minis is it was flown by 1073. For some reason this particular booster has never flown the "max" number of starlinks to a particular shell. First launch it did 53 to Group 4, which was the max for a bit for Group 4 launches, but they were able to do max 54 towards the end of that shell. Then every other launch afterwards it was 52 sats for Group 4, 54 sats for Group 5, or 21 sats for Group 6, which are all lower then the max that was carried.

For those keeping track, does this particular booster's launches also correspond to short nozzle upper stages?

? Short nozzle is never used on Starlink missions

Offline OceanCat

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Re: Starlink v2 mini satellites
« Reply #183 on: 09/05/2023 09:39 pm »
So that is the last 3 launches for Starlink V2.0 Mini's whihc only had 21 satellites (down from the previous 22.

7-1  Vandenberg
6-12  39A
6-14  SLC-40

Is anyone else ready to call this a new variant of the V2.0 Mini?

They may have launched a few heavier SCS (aka direct-to-cellular) varians. A lot of people don't realize SpaceX has a license to launch 2,016 gen2 SCS satellites and provide service in Germany. They may also have experimental or market access licenses in other countries.

Quote
Space Exploration Technologies Corp. (“SpaceX”) petitions for a declaratory ruling
granting market access to operate its direct-to-cellular Mobile-Satellite Service (“MSS”) payload
in the United States in the 1910-1915 MHz and 1990-1995 MHz bands (the “PCS G Block”).
The payload has been licensed by the German Administration (Assignment of Orbit and
Frequency Usage Rights, No. 023-2022/BNetzA (223) (issued Dec. 6, 2022).)

The SpaceX direct-to-cellular system will consist of a German-licensed hosted payload
flown on a subset of 2,016 of the second-generation (“Gen2”) non-geostationary orbit (“NGSO”)
satellites recently authorized for Space Exploration Holdings, LLC at 525 km and 530 km
altitudes. The direct-to-cellular system will be deployed on up to 72 satellites per plane (of the
120 satellites per plane in the “Amended Gen2 System Orbital Parameters (Configuration 1)”)
and up to a total of 28 planes at 53 and 43 degree inclinations.

Offline raptorx2

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Re: Starlink v2 mini satellites
« Reply #184 on: 09/05/2023 10:05 pm »
So that is the last 3 launches for Starlink V2.0 Mini's whihc only had 21 satellites (down from the previous 22.

7-1  Vandenberg
6-12  39A
6-14  SLC-40

Is anyone else ready to call this a new variant of the V2.0 Mini?

They may have launched a few heavier SCS (aka direct-to-cellular) varians. A lot of people don't realize SpaceX has a license to launch 2,016 gen2 SCS satellites and provide service in Germany. They may also have experimental or market access licenses in other countries.

Quote
Space Exploration Technologies Corp. (“SpaceX”) petitions for a declaratory ruling
granting market access to operate its direct-to-cellular Mobile-Satellite Service (“MSS”) payload
in the United States in the 1910-1915 MHz and 1990-1995 MHz bands (the “PCS G Block”).
The payload has been licensed by the German Administration (Assignment of Orbit and
Frequency Usage Rights, No. 023-2022/BNetzA (223) (issued Dec. 6, 2022).)

The SpaceX direct-to-cellular system will consist of a German-licensed hosted payload
flown on a subset of 2,016 of the second-generation (“Gen2”) non-geostationary orbit (“NGSO”)
satellites recently authorized for Space Exploration Holdings, LLC at 525 km and 530 km
altitudes. The direct-to-cellular system will be deployed on up to 72 satellites per plane (of the
120 satellites per plane in the “Amended Gen2 System Orbital Parameters (Configuration 1)”)
and up to a total of 28 planes at 53 and 43 degree inclinations.

Correct!  I have been trying to explain this to other people (regarding the original  "Market Access for the German licensed payload".) They already have authority outside of the US. Many claim that SpaceX can not do D2C on anything except a V2.0.  I told them that Lynk is doing "Voice and Text" on Cubesats.  So I think they can do it on Mini's (if not on  later builds of V1.5s also)

Starlink group 8-1 just showed up on the US Launcher manifest on NSF from Vandenberg late September?

This almost has to be 96.9° / 360km. Because 33° or 38° would be a bust from Vandenberg, worse than Group 6. (retrogrades?)
30 per/ 120 planes

Seems like the fastest route to a "Global D2C" system.  (Like Iridium)

Re: Starlink v2 mini satellites
« Reply #185 on: 09/05/2023 10:20 pm »
Quote
Correct!  I have been trying to explain this to other people (regarding the original  "Market Access for the German licensed payload".) They already have authority outside of the US. Many claim that SpaceX can not do D2C on anything except a V2.0.  I told them that Lynk is doing "Voice and Text" on Cubesats.  So I think they can do it on Mini's (if not on  later builds of V1.5s also)

Starlink group 8-1 just showed up on the US Launcher manifest on NSF from Vandenberg late September?

This almost has to be 96.9° / 360km. Because 33° or 38° would be a bust from Vandenberg, worse than Group 6. (retrogrades?)
30 per/ 120 planes

Seems like the fastest route to a "Global D2C" system.  (Like Iridium)

Group 8 has the exact same landing coordinates as the Group 7 flyover options. I bet its just another 53 deg shell, same as Group 7.
« Last Edit: 09/05/2023 10:21 pm by spacenuance »

Offline raptorx2

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Re: Starlink v2 mini satellites
« Reply #186 on: 09/05/2023 10:39 pm »
So 53° @ 340km?  Seems that we are approaching a period of increased solar activity  that they would avoid the lower altitude shells for a number of years?

Online FutureSpaceTourist

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Re: Starlink v2 mini satellites
« Reply #187 on: 09/17/2023 05:23 am »
https://twitter.com/spacex/status/1703132464712237216

Quote
Video of last night’s @Starlink satellite deployment

Screen grabs from the video attached

Offline Asteroza

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Re: Starlink v2 mini satellites
« Reply #188 on: 09/18/2023 11:28 pm »
https://twitter.com/spacex/status/1703132464712237216

Quote
Video of last night’s @Starlink satellite deployment

Screen grabs from the video attached

Pic 8315 is interesting. Is there no traditional payload adapter, and the mini's are somehow mounted on the interstage directly via those top and bottom edge plates?

Offline Mandella

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Re: Starlink v2 mini satellites
« Reply #189 on: 09/19/2023 01:16 pm »
https://twitter.com/spacex/status/1703132464712237216

Quote
Video of last night’s @Starlink satellite deployment

Screen grabs from the video attached

Pic 8315 is interesting. Is there no traditional payload adapter, and the mini's are somehow mounted on the interstage directly via those top and bottom edge plates?

Isn't that the same philosophy as the first production version of Starlink? They surprised everyone by not having a payload adapter and just flinging the sats off the rocket then too.

Offline raptorx2

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Re: Starlink v2 mini satellites
« Reply #190 on: 09/21/2023 03:46 am »
I think if you look in the "reflections" you can see the dispenser retainer arms folding back. However, they do appear that they remain connected to the Second Stage for deorbit.

Offline raptorx2

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Re: Starlink v2 mini satellites
« Reply #191 on: 09/21/2023 04:25 am »
Interesting on X/Twitter.

Claims the secret XL Faring photo we saw a couple of weeks ago is actually going to be used to deploy F9-3's Direct 2 Cell.
Facts and figures seem pretty convincing.

https://twitter.com/FREESPEECH1017/status/1704712820687040964

Offline raptorx2

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Re: Starlink v2 mini satellites
« Reply #192 on: 09/21/2023 04:39 am »
Interesting on X/Twitter.

Claims the secret XL Faring photo we saw a couple of weeks ago is actually going to be used to deploy F9-3's Direct 2 Cell.
Facts and figures seem pretty convincing.

https://twitter.com/FREESPEECH1017/status/1704712820687040964

If true, then what is the payload to LEO performance penalty with F9-3 ~900kg satellites and the larger faring?

I would expect them to use a well-experienced first stage given the new dynamics for at-sea drone ship landings.

Perhaps 1061 or 1063

Online FutureSpaceTourist

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Re: Starlink v2 mini satellites
« Reply #193 on: 09/26/2023 05:16 pm »
Crosspost:

https://twitter.com/starlink/status/1706718537711337650

Quote
Our next generation Starlink optical space lasers (pew pew!) were launched to orbit on Monday 🛰️🌎

Offline raptorx2

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Re: Starlink v2 mini satellites
« Reply #194 on: 09/26/2023 08:44 pm »
Didn't they initially put these on the original V2.0 Mini prototype satellites?  Group 6-1, 6-2  (Many now deorbited)

Offline RedLineTrain

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Re: Starlink v2 mini satellites
« Reply #195 on: 09/26/2023 11:48 pm »
100 Gbps is the figure of merit for those laser links.

https://twitter.com/Starlink/status/1706719043460514101

Offline Asteroza

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Re: Starlink v2 mini satellites
« Reply #196 on: 09/26/2023 11:50 pm »
Crosspost:

https://twitter.com/starlink/status/1706718537711337650

Quote
Our next generation Starlink optical space lasers (pew pew!) were launched to orbit on Monday 🛰️🌎

Does this seem to suggest most of the ISL gymbal (for this laser at least) is for left-right movement and less up-down?

Offline kevin-rf

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Re: Starlink v2 mini satellites
« Reply #197 on: 10/02/2023 02:14 am »
Considering you are either looking at the next satellite ahead or behind or  right or left. Not much adjustment is needed up / down. You will be looking slightly down at a satellite a fixed distance due to curvature of the orbit.

The tracking does get exciting when looking between planes near the top/bottom (bad terminology on my part) of the orbit as the planes cross. But that is mostly in azimuth,  not attitude (up/down).

It does bring up a question in my mind. For the plane to plane connections. I do wonder if spaceX only uses the part of the orbit that the satellites have low motion in relation to each other for cross plane ISL. Say for 53 degrees when satellites are between msybe a wag of +/-45 for the cross plane connections. You still have the ahead and behind connections the entire orbit. It gets tricky to track adjacent satellites as you pass the northern/ southern limits of the orbits.
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