[Ground-station] Presentation of Material to ESA

[Michelle Thompson]

Ok.

Finish documenting the propulsion design at
https://github.com/haifuraiya/propulsion_subsystem_haifuraiya. We can then
1) build a prototype and also 2) use it as part of a proposal.

Let me know when it's uploaded.

The deadline from UKMG is 4 December.

-Michelle Thompson




On Tue, Nov 21, 2023 at 6:08 PM Samudra Haque [TTLLC] <
sehaque at tekterrain.com> wrote:

> I would like to help where possible.
>
> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
> Get Outlook for Android <https://aka.ms/AAb9ysg>
> ------------------------------
> *From:* Ground-Station
> <ground-station-bounces at lists.openresearch.institute> on behalf of
> Michelle Thompson via Ground-Station
> <ground-station at lists.openresearch.institute>
> *Sent:* Tuesday, November 21, 2023 8:58:25 PM
> *To:* Michelle Thompson via Ground-Station
> <ground-station at lists.openresearch.institute>
> *Subject:* [Ground-station] Presentation of Material to ESA
>
> Greetings all,
>
> Hat tip to Kent Britain for the following, which was in a recent issue of
> Scatterpoint, the UK Microwave journal.
>
> I'll forward everything relevant that we have been working on. It's quite
> a lot and should be helpful. Anyone that wants to help with this proposal
> and communication effort is of course welcome.
>
> Please read the announcement below and share your thoughts.
>
> "Satellite Proposal for discussion
>
> At the recent RSGB Convention / AMSAT-UK Colloquium at Milton Keynes,
> Frank Zeppenfeldt, PD0AP, from the European Space Agency Satellite
> Communications Group, made a presentation on the subject of a future ESA
> backed amateur satellite mission to GEO. Frank has obtained funding of
> 250,000 Euro to investigate the possibility of an Amateur satellite or
> payload to be placed in GEO orbit. The presentation emphasises innovation
> and microwave
> communications.
>
> Frank's full presentation is available on YouTube
>
> https://www.youtube.com/watch?v=_FTvlEyDa1Y&t=37s&pp=ygUYYW1zYXQgVUsgY29sbG9xdWl1bSAyMDIz
>
> As a member of the UK microwave / Satellite community, we would like to
> invite you to contribute to the design concept of this mission.
> We would welcome any thoughts you may have via e-mail etc. and we will add
> those to the overall discussion.
>
> In a follow up Teams meeting on Wed 1st Nov between Frank and AMSAT-UK, it
> became clear that an ideal solution from an ESA perspective should provide
> a service to amateurs in Canada as well as Europe. - Canada is an ESA
> cooperating state. Note that any GEO covering part or all of Canada will
> also cover a significant proportion of The USA.
>
> AMSAT-UK is working to identify a suitable range of GEO slots which meet
> this requirement.
>
> What is needed, is a proposal for 2 or 3 ideas for what this GEO mission
> (most likely a hosted payload) should include.
>
> See notes / Franks presentation.
>
> AMSAT-UK aims to respond with some proposals by Dec 4th. These do not need
> great detail, but should justify bands used and other ideas.
>
> For Example.
>
> What bands should be included. - This project is not aimed as a QO-100
> replacement.
>
> Is 24G and up practical? Can a ground station generate enough power
> economically with today’s available technology
> for an uplink on 24/47/76G
>
> Given a resource in space, is there an 'easy' entry level on say 24G - RX
> or TX so we can attract new microwave operators.
>
> Should the transponder/s be old style bent pipe configurations or contain
> on board processing to decode RX signals then encode the downlink?
>
> What digital protocols are appropriate for the above?
>
> Is 5.6G viable as an uplink given the WiFi presence?
>
> Any observations on 6cm interference would be valuable.
>
> Note: The antennas on the satellite will likely have a min gain of 20dB as
> this covers the visible portion of the Earth from geostationary orbit.
>
> In recent discussions with BATC etc we have concluded that a 10G downlink
> should be the baseline to take advantage of the large existing userbase and
> that a minimum power output onboard needs to be 10W into a 20dB antenna.
>
> If the proposals are considered substantial enough for further discussion,
> we have suggested a meeting at the ESA technical centre in The Netherlands
> around end Feb / March next year. This 2 day (?) event would be funded by
> ESA probably via A-UK. If this meeting happens, then representatives from
> A-UK BATC and UK microwave group could attend along with other groups from
> The EU and USA so we can take the project forward.
>
> Frank anticipates doing some initial prototyping and then present the
> findings to a meeting of GEO platform operators next year. Hopefully this
> will find a commercial partner with a platform going to an appropriate GEO
> slot.
>
> If any of this is of interest, please let us know your thoughts.
>
> This is a rare opportunity. I hope you can give it your support.
>
> David G0MRF / Noel G8GTZ"
>
> -Michelle Thompson
>
> "Potestatem obscuri lateris nescis."
>
>
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