Value chain · CLM-0714
In plain terms
The 2021 UK study by Frazer-Nash Consultancy proposed that the satellite fly itself to its final orbit, using its own solar panels to run its own electric thrusters. Chemical tugs would take the parts only partway, to about 5,900 km, just above the inner radiation belt, where the satellite would be built. The study said the plan needed further work and gave no figures for the self-powered trip.
The claim as recorded
The UK Frazer-Nash study states, in an input-data annex, a self-powered final orbit raise: chemical tugs take payloads to a medium Earth orbit "just above the inner Van Allen belt, at an altitude of around 5,900km", the satellite is assembled there, and then "the fully assembled SPS, using on-board electric propulsion, self-powered by the SPS solar arrays, would raise it into its final operational orbit". The study's Phase 2 report gives the purpose of this sequence as avoiding "extensive loiter in the harsh environment of the Van Allen belts", says assembly there "could be done", and adds "This needs further study as part of the system design." It is a stated intent arranged to limit time in the belts, not an engineered transfer.
Scope and limits
T4 consultancy tier, and this is a stated design intent in an input-data annex, not a demonstrated capability or a detailed transfer analysis. No delta-v, no transfer duration, no thruster type and no power figure are given for the self-powered leg. The 5,900 km MEO staging altitude is asserted, not justified against a dose calculation in the pages read. SRC-021 PDF p.62 says assembly above the inner belt "could be done" and "needs further study"; SRC-024 PDF p.15 lists "raising the orbit with high specific impulse (Isp) propulsion, avoiding the Van Allen radiation belts" among "other technical challenges". The sequence is arranged to avoid loitering in the belts; the pages read do not describe the finished array operating while crossing them. The same consultancy's later studies plan the trip differently: its 2022 study for ESA assumed the modules reach their final orbit on a chemical-rocket transfer vehicle (SRC-078, PDF p.25), and its 2025 study with Space Solar Engineering and Imperial College set aside solar electric propulsion from low Earth orbit for a small-scale design, because the long transfer would spend too much time in the inner Van Allen belt (SRC-076, PDF p.18).
What it assumes
No assumptions are recorded against this claim.
Where it comes from
PDF p.11 (index 10), verbatim and in document order: "The SPS payloads would be launched to LEO, where a transportation infrastructure of chemical tugs would raise the payload to a medium earth orbit (MEO), just above the inner Van Allen belt, at an altitude of around 5,900km. Here the SPS would be assembled. Then the fully assembled SPS, using on-board electric propulsion, self-powered by the SPS solar arrays, would raise it into its final operational orbit."
Related records
- Answers question
- QST-040 not published in this release
- Contradicts
- CLM-0685 not published in this release (was ; withdrawn 2026-09-04 see notes)
Cite this
energyaperture.com/c/clm-0714
CLM-0714, Energy Aperture, as of 2021.
Connected records
Other published records linked to this one. A list, not a judgement.
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