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boundary="------------io88RH1V65vxFp0vkGEHW0XN" Content-Language: en-US Subject: Re: [Starlink] =?utf-8?q?Starlink_Rival_Astranis_Debuts_Next-Gen_Sate?= =?utf-8?q?lite_with_5X_More_Capacity_=E2=80=93_Zimbabwe_Leading_Tech_Maga?= =?utf-8?q?zine?= X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 May 2024 02:18:52 -0000 --------------io88RH1V65vxFp0vkGEHW0XN Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable I find these discussions a little problematic, for a variety of reasons. For one, there is no uniform notion of "speed" or "capacity" here.=20 Before you compare anything, it's important to clarify whether you mean: 1) A satellite's capacity to downlink to a single user. 2) A satellite's capacity to downlink to a single cell. 3) A satellite's capacity to do 2) above in the presence of users in=20 other cells 4) The capacity of a constellation to downlink to a single user or cell. 5) The capacity of a satellite or a constellation to downlink to a set=20 of cells (however you'll define that) 6) The capacity of a satellite to handle uplink or through traffic (with=20 ISLs, from users, from gateways) 7) The capacity of a satellite to handle downlink traffic from users to=20 (a) gateway(s) 8) Dishy's capacity to actually receive from a satellite or a=20 constellation. E.g., Starlink is licenced to use a number of Ka-band=20 beams for user downlink but in its various FCC applications for end user=20 terminals, SpaceX makes no mention of Ka-band use, so presumably (at=20 least in the US) isn't licensed to use Ka-band here. Once you've clarified that, you'll discover quickly that the answers you=20 are looking for depend on other factors, too, such as constellation=20 design, where the users on the ground are, and where and how you connect=20 your constellation to the Internet. On 18/05/2024 12:42 pm, David Lang via Starlink wrote: > On Fri, 17 May 2024, Hesham ElBakoury via Starlink wrote: > > > The new Omega satellite promises to offer more internet capacity at=20 > a low > > cost with a new satellite designed to beam over 50Gbps of internet=20 > capacity > > to the Earth. > > > >=20 > https://technomag.co.zw/starlink-rival-astranis-debuts-next-gen-satelite-= with-5x-more-capacity/=20 > > > do they realize that the starlink v2-mini satellites are at 50-100Gbps > currently? yes the individual user is only getting ~200Mb, because=20 > they have > enough customers to need to share the available bandwidth (and if you=20 > want to > pay enough, you can get a lot more) > > not to mention the increased latency from the signal having to travel=20 > 60x as far > (or the problem that there are far fewer satellites that can be=20 > deployed at > geostationary orbit than at the starlink altitudes) > > the article authors read a press release and don't know what they are=20 > talking > about :-( > > David Lang > > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink > > > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink > --=20 **************************************************************** Dr. Ulrich Speidel School of Computer Science Room 303S.594 (City Campus) The University of Auckland u.speidel@auckland.ac.nz =20 http://www.cs.auckland.ac.nz/~ulrich/ **************************************************************** --------------io88RH1V65vxFp0vkGEHW0XN Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

I find these discussions a little problematic, for a variety of reasons.

For one, there is no uniform notion of "speed" or "ca= pacity" here. Before you compare anything, it's important to clarify whether you mean:

1) A satellite's capacity to downlink to a single user.
2) A satellite's capacity to downlink to a single cell.
3) A satellite's capacity to do 2) above in the presence of users in other cells
4) The capacity of a constellation to downlink to a single user or cell.
5) The capacity of a satellite or a constellation to downlink to a set of cells (however you'll define that)
6) The capacity of a satellite to handle uplink or through traffic (with ISLs, from users, from gateways)
7) The capacity of a satellite to handle downlink traffic from users to (a) gateway(s)
8) Dishy's capacity to actually receive from a satellite or a constellation. E.g., Starlink is licenced to use a number of Ka-band beams for user downlink but in its various FCC applications for end user terminals, SpaceX makes no mention of Ka-band use, so presumably (at least in the US) isn't licensed to use Ka-band here.

Once you've clarified that, you'll discover quickly that the answers you are looking for depend on other factors, too, such as constellation design, where the users on the ground are, and where and how you connect your constellation to the Internet.

On 18/05/2024 12:42 pm, David Lang via Starlink wrote:
=20 On Fri, 17 May 2024, Hesham ElBakoury via Starlink wrote:

> The new Omega satellite promises to offer more internet capacity at a low
> cost with a new satellite designed to beam over 50Gbps of internet capacity
> to the Earth.
>
> https:/= /technomag.co.zw/starlink-rival-astranis-debuts-next-gen-satelite-with-5x-m= ore-capacity/

do they realize that the starlink v2-mini satellites are at 50-100Gbps
currently? yes the individual user is only getting ~200Mb, because they have
enough customers to need to share the available bandwidth (and if you want to
pay enough, you can get a lot more)

not to mention the increased latency from the signal having to travel 60x as far
(or the problem that there are far fewer satellites that can be deployed at
geostationary orbit than at the starlink altitudes)

the article authors read a press release and don't know what they are talking
about :-(

David Lang 
______________________________=
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______________________________=
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--=20
****************************************************************
Dr. Ulrich Speidel

School of Computer Science

Room 303S.594 (City Campus)

The University of Auckland
u.speidel@auckland.ac.nz=20
http://www.cs.auckland.ac.nz/~ulrich/
****************************************************************
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