Value chain · CLM-0049
In plain terms
The stated design intent in a 2007 URSI white paper is that the beam would be shaped to fall to 10 watts per square metre by the edge of the receiving site, which the paper gives as the human safety limit in most countries.
The claim as recorded
The URSI White Paper states the design principle for the ground segment explicitly: the maximum allowable microwave power level for human safety has been set to 10 W/m2 in most countries, and the SPS power-flux density would be constructed to satisfy this requirement at the periphery of the rectenna.
Scope and limits
A statement of design intent in a URSI White Paper, which the URSI scientific and national commissions approved (PDF p3, printed i); not a regulatory instrument and not a compliance demonstration for any specific design. The same paper notes that "the above estimate for the rectenna size does not take into account any safety margin due to the pointing accuracy of 300 m" (PDF p31, printed p11).
What it assumes
No assumptions are recorded against this claim.
Where it comes from
Verbatim: "For human safety requirements, the maximum-allowable microwave power level has been set to 10 W/m2 in most countries, and the SPS power-flux density would be constructed to satisfy this requirement at the periphery of the rectenna."
Related records
- Answers question
- QST-001 not published in this release
Cite this
energyaperture.com/c/clm-0049
CLM-0049, Energy Aperture, as of 2007-06.
Connected records
Other published records linked to this one. A list, not a judgement.
- Also from SRC-100
- CLM-0032In 2007 the international radio science union published a white paper saying that nobody had measured this heating effect from the ground...CLM-0047Heating falls with the square of frequency. In 2007 no ground-based measurement of it was available at gigahertz frequencies, and...CLM-0048An international scientific body reviewed the proposed figures, found them ranging from 230 to 1,000 watts per square metre, and chose 300...CLM-0067According to a 2007 international report, Japanese designs of the time chose their beam strength on cost and land grounds; the report does...CLM-0079The 1978 paper modelled both a ground facility and a satellite case, and its 500 watts per square metre figure is a power flux for a given...CLM-0083The formula is the right type but nobody has said how far it can be pushed, and at space solar power frequencies the wave is about 200...CLM-0101The 1978 contract required the researchers to report fixes if ionospheric disturbance pushed the pilot-beam phase error past 2 to 3...CLM-0137In four major space solar power studies from 1978 to 2007, none put a number on how much of the beam's energy would be lost if the beam...More on the source page.