#### vsatman

« Reply #3320 on: 11/10/2021 08:47 am »
What is the theoretical maximum SNR for a Dishy-sized array?

According to my calculations, 13.64 dB for the case when the satellite is shining at the terminal with 48 cm diameter at a 90 degrees elevation angle .
In this case, it works 100% of terminal`s  square. But if the elevation angle is less than 90 degrees ,  then % the working area is equal to the sinus of the elevation angle..
For 60 degrees this 84% ,  for  30 degrees only 50%..... and really  SNR will be less..

#### envy887

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« Reply #3321 on: 11/10/2021 10:54 pm »
What is the theoretical maximum SNR for a Dishy-sized array?

According to my calculations, 13.64 dB for the case when the satellite is shining at the terminal with 48 cm diameter at a 90 degrees elevation angle .
In this case, it works 100% of terminal`s  square. But if the elevation angle is less than 90 degrees ,  then % the working area is equal to the sinus of the elevation angle..
For 60 degrees this 84% ,  for  30 degrees only 50%..... and really  SNR will be less..

The dish is 59 cm.

#### su27k

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« Reply #3322 on: 11/11/2021 09:33 am »
Shift4 stock surges after company signs payments deal with SpaceX’s Starlink

Quote from: CNBC
* Shares of payments processing company Shift4 surged in trading on Wednesday after the company announced a five-year partnership with SpaceX’s Starlink satellite internet service.

* “Starlink is a cornerstone, global client opening up opportunity throughout the globe. By servicing the business globally, Shift4′s [total addressable market] expands in all the verticals we serve,” the company said.

* Jared Isaacman, founder and CEO of Shift4, notably became an astronaut when he flew to orbit with SpaceX in September on the historic Inspiration4 private mission

Note this is just SpaceX using Shift4 to process user payments for Starlink.

#### Asteroza

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« Reply #3323 on: 11/11/2021 11:13 pm »
What is the theoretical maximum SNR for a Dishy-sized array?

According to my calculations, 13.64 dB for the case when the satellite is shining at the terminal with 48 cm diameter at a 90 degrees elevation angle .
In this case, it works 100% of terminal`s  square. But if the elevation angle is less than 90 degrees ,  then % the working area is equal to the sinus of the elevation angle..
For 60 degrees this 84% ,  for  30 degrees only 50%..... and really  SNR will be less..

The dish is 59 cm.

#### Asteroza

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« Reply #3324 on: 11/12/2021 10:07 am »

Christian Frhr. von der Ropp on LinkedIn made an interesting comment that SDA had warned about rad hardness of lasercomm terminals for the Transport Layer constellation, and the deorbit oddly seems to coincide with the spike in solar flares around October 26

Did those sats really suffer more than previous Starlink sats? Was that a function of the polar orbit/solar flare combo? Were only the LCT's damaged?

They are clearly operational enough to perform deorbit for now...

#### soltasto

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« Reply #3325 on: 11/12/2021 12:24 pm »

Christian Frhr. von der Ropp on LinkedIn made an interesting comment that SDA had warned about rad hardness of lasercomm terminals for the Transport Layer constellation, and the deorbit oddly seems to coincide with the spike in solar flares around October 26

Did those sats really suffer more than previous Starlink sats? Was that a function of the polar orbit/solar flare combo? Were only the LCT's damaged?

They are clearly operational enough to perform deorbit for now...

SpaceX also deorbited the functional v0.9 satellites just because they weren't useful for the full constellation. Those Transporter-1 satellites were pretty much test satellites with lasers, so it is not unlikely that they just completed their tests and now they are not useful anymore. Why aren't they useful anymore? While the assertion that the links were damaged by the solar flare is a possibility, that guess comes from a SpaceX competitor that has all interest in putting SpaceX in bad light, so the worst possibility (SpaceX forgetting about radiation) automatically becomes the only possibility to talk about for them.

There are many more possible reasons for SpaceX to deorbit them:
Incompatible HW with the new satellites
Compatible HW but much lower performance compared tot he new ones, would bottleneck the system
Any other issue whatsoever with the ISL HW that could have popped up regardless of the solar flare, ranging from power issues, cooling/heating issue, alignment issues...

#### vsatman

« Reply #3326 on: 11/12/2021 03:25 pm »
The dish is 59 cm.

Yes , dish is 59 cm, but antenna size is only 48 cm , see file

#### vsatman

« Reply #3327 on: 11/12/2021 03:35 pm »
new dish  is  50 x 30 cm, antenna size 48 x 29 cm
BUT!!! is very important  that
Aperture efficiency is 74%  (for UT1 is only 57%)
Maximum Transmit Duty Cycle is 14% (for UT1 is only11%)

#### oldAtlas_Eguy

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« Reply #3328 on: 11/12/2021 05:48 pm »
new dish  is  50 x 30 cm, antenna size 48 x 29 cm
BUT!!! is very important  that
Aperture efficiency is 74%  (for UT1 is only 57%)
Maximum Transmit Duty Cycle is 14% (for UT1 is only11%)

Thanks great summary of improvements.

#### envy887

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« Reply #3329 on: 11/12/2021 06:00 pm »
new dish  is  50 x 30 cm, antenna size 48 x 29 cm
BUT!!! is very important  that
Aperture efficiency is 74%  (for UT1 is only 57%)
Maximum Transmit Duty Cycle is 14% (for UT1 is only11%)

Where are those efficiency numbers from?

#### snotis

« Reply #3330 on: 11/12/2021 06:12 pm »
Doing a very rough approximation of capabilities between the two:

Area x Aperture efficiency x Maximum Transmit Duty Cycle:

UT1: 1809.5 cm2 x 57% x 11% = 113.5
New UT: 1030.1 cm2 x 74% x 14% = 144.2

New UT about 27% more capable.

new dish  is  50 x 30 cm, antenna size 48 x 29 cm
BUT!!! is very important  that
Aperture efficiency is 74%  (for UT1 is only 57%)
Maximum Transmit Duty Cycle is 14% (for UT1 is only11%)

#### su27k

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« Reply #3331 on: 11/13/2021 03:46 am »

Nothing new about Gen2, but has update for current constellation:
- Currently serving ~140,000 users in 20+ countries (production slowed by shipchip shortage)
- Over 750,000 orders/deposits globally

Previous presentation on August 2nd has "~90,000 users in 12 countries, half a million orders/deposits globally"
« Last Edit: 11/13/2021 03:51 am by su27k »

#### vsatman

« Reply #3332 on: 11/13/2021 07:16 am »
Where are those efficiency numbers from?

#### su27k

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« Reply #3333 on: 11/14/2021 05:19 am »
Quote
Inter-satellite laser communications means Starlink can carry data at speed of light in vacuum all around Earth before touching ground.

Over time, some amount of communication can simply be from one user terminal to another without touching the Internet.

Quote
Q: My parents are about to travel the earth by boat and it would be great if they could use Starlink for their voyage!

A: Should work everywhere for global maritime by roughly middle of next year (enough sats with laser links launched). Until then, it will be patchy when far from land.

#### su27k

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« Reply #3334 on: 11/17/2021 02:38 am »
Quote
Bruno mentions that constellations are limiting launch windows. SpaceX’s Bill Gerstenmaier then mentions that SpaceX worked with ULA to provide more accurate Starlink data to free up windows for the Lucy launch. #ascendspace

Gerst adds that Russia’s ASAT test “created more debris than any megaconstellation”; a “huge mess.”

Bruno: there has to be consequences for that kind of behavior. #ascendspace

#### ulm_atms

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« Reply #3335 on: 11/24/2021 12:19 am »
Well, Starlink.com updated a lot of pre-orders today.  Most everyone that has mid to late 2021....doesn't anymore....

I now have mid 2022......

Does ANYONE know what the roll out issue is in the USA?  They say chip shortages...but I see many post daily of people in other countries all over the world getting their dishy shipped right when they order...but rarely see anyone in the states post getting one.  I am just about what is going on at this point with it.  I just feel that there has got to be something else besides the chips going on.

#### AC in NC

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« Reply #3336 on: 11/24/2021 01:54 am »
Well, Starlink.com updated a lot of pre-orders today.  Most everyone that has mid to late 2021....doesn't anymore....

I now have mid 2022......

Does ANYONE know what the roll out issue is in the USA?  They say chip shortages...but I see many post daily of people in other countries all over the world getting their dishy shipped right when they order...but rarely see anyone in the states post getting one.  I am just about what is going on at this point with it.  I just feel that there has got to be something else besides the chips going on.

I don't have any insight at all but why would it be anything more complicated than that they've allocated various allotments to each country to support the desired penetration and cell-loading.  Dishy's were reported to be expensive so they cannot have just produced at will and so it seems obvious that it's allocation.

#### su27k

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« Reply #3337 on: 11/24/2021 02:14 am »
Starlink update email posted on reddit:

Quote
Thank you for being a supporter of Starlink! Over 14 million people have inquired about Starlink service in their area and today Starlink is available in over 20 countries (and counting).

The Starlink team has been working hard to expand service and increase capacity while continuously improving quality of service. We will be able to accommodate more users per area as we increase the number of satellites in orbit.

Check delivery timelines in your account

Silicon shortages over the last 6 months have slowed our expected production rate and impacted our ability to fulfill many Starlink orders this year. We apologize for the delay and are working hard across our engineering, supply chain, and production teams to improve and streamline our product and factory to increase our production rate.

You can check estimated delivery times by logging into your account page on Starlink.com. You will still receive an email from the Starlink team when your order is ready to ship, and you may cancel your order at any time for a full refund of your deposit.

We recently released the latest version of Starlink which was designed for high volume manufacturing. The latest version of Starlink has comparable performance to the previous version and will begin to ship globally next year.

Expanding to more countries across the world

Since our October 2020 launch in the United States we have expanded our service to 20 additional countries: Canada, United Kingdom, Germany, New Zealand, Australia, Austria, France, Netherlands, Belgium, Denmark, Ireland, Switzerland, Portugal, Chile, Poland, Italy, Czech Republic, Mexico, Sweden, and Croatia. Pending regulatory approval, we are planning to launch in an additional 45+ new countries by the end of 2022.

More satellites in orbit with newer technology

We recently completed our 31st Starlink launch with our latest generation of satellites that are equipped with inter-satellite laser links, which enable our satellites to transfer data between each other. Once fully deployed, inter-satellite laser links will make Starlink one of the fastest options available to transfer data around the world.

Thank you for your continued support!

#### Mandella

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« Reply #3338 on: 11/24/2021 02:42 am »
Well, Starlink.com updated a lot of pre-orders today.  Most everyone that has mid to late 2021....doesn't anymore....

I now have mid 2022......

Does ANYONE know what the roll out issue is in the USA?  They say chip shortages...but I see many post daily of people in other countries all over the world getting their dishy shipped right when they order...but rarely see anyone in the states post getting one.  I am just about what is going on at this point with it.  I just feel that there has got to be something else besides the chips going on.

What do you suggest? I'm sure their production is not running as fast as they wanted (it never does), plus the chip shortage is not going to make that any better.

Starlink is not vaporware -- people have dishes and they are working fine. They have not run out of money. Satellites are still being launched. Dishes are being shipped to other countries than yours because SpaceX wants global coverage and is going to get the foot in the door in as many places as it can to get ahead of competition.

Am I disappointed? Sure. In fact, I'm seriously thinking about switching to the competition. Whups, there is none here. So they get to keep my deposit until either they come through or somebody else decides to serve my area with something competitive.

At this point I'd just as soon wait a bit more and get the new dish...

#### vsatman

« Reply #3339 on: 11/24/2021 11:01 am »
is going to get the foot in the door in as many places as it can to get ahead of competition.
Sorry, who do you mean by a competitor??

all fiber or satellite via GSO are not competitor...

Tags: pole flip