ESA SPS system studies

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Dec 30, 2023, 11:17:52 AM12/30/23

A friend who is working on SPS in the UK (I was about to say, “in Europe,” but had to correct myself 😊) pointed out a couple of system study reports coming out of ESA contracts recently:



And this one about using lunar materials to build SPSs, from earlier this year:


- Kieran

Arthur Woods

Dec 31, 2023, 6:06:59 AM12/31/23

Actually there was another recently published system study in addition to the Thales Alenia study.

This one was by Arthur D. Little which investigated a Direct Sun Reflecting solution instead of a traditional SBSP power generating approach.

ESA also presented the results of two super-heavy reusable launcher concepts 'PROTEIN' that were recently completed by ArianeGroup and Rocket Factory Augsburg.
Apparently, these study results have not yet been added to the ESA Nebula Public Library.

My company Astrostrom was responsible for the study using lunar materials to build SPSs.



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Bryan Zetlen

Dec 31, 2023, 12:19:15 PM12/31/23
to Arthur Woods, Ed Tate, Francois Lambert,,
Thank you Arthur given the astonishing number of new pop-up ‘space’ companies, I expect we’re going to be seeing concept proposals for every imaginable design on the covers of 1950s sci-fi paperbacks. Practical economics - at least for the time being point toward a new generation of heavy and super heavy lifters (with a few suborbital and LEO ‘lite’ launchers thrown in) that will be built not so much according to massive innovation and technology breakthroughs, as on improved control systems, engine reusability, refurb efficiency and more cost effective production processes. I believe there’s some interest in developing a brand new shuttle type pickup truck for mass transfer to LEO, space stations and who can guess what else. Maybe discount outlet stores or casinos. For years to come I believe the most ‘sustainable’ customers and clients will be department of defense, other govt agencies and GSO replacements. If the numbers work out, we may also be seeing a generation of heavy lifters designed to place GEOsats in LEO and MEO transfer orbits. 

Geoffrey Landis

Dec 31, 2023, 1:00:39 PM12/31/23
to Power Satellite Economics
I do hope that they referenced us.

Geoffrey A. Landis

dennis bushnell

Dec 31, 2023, 1:24:12 PM12/31/23
to Geoffrey Landis, Power Satellite Economics
A recent brit study indicated 15 cents/kwh…..WAYYYY to high to be competitive, and would take far too long to build out compared to the some 10 years we apparently have now to do somethings seriously effective wrt climate


Jan 1, 2024, 6:44:55 AMJan 1
to dennis bushnell, Geoffrey Landis, Power Satellite Economics

And to build out the entire fleet of 80,000 1 GW as Mike Snead says! 


Dr. Ajay P. Kothari


Astrox Corporation

 AIAA Associate Fellow


Ph: 301-935-5868




From: <> on behalf of dennis bushnell <>
Sent: Sunday, December 31, 2023 1:23 PM
To: Geoffrey Landis <>
Cc: Power Satellite Economics <>
Subject: Re: Orbital mirrors [Re: ESA SPS system studies]
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