I find these discussions a little problematic, for a variety of reasons.
For one, there is no uniform notion of "speed" or "capacity" 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 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-more-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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