There’s a long piece in this week’s Economist on the current prospects for solar power satellites. It’s a pretty good overview, but has a few problems. First of all, it doesn’t mention lasers at all. This is particularly a large oversight when it comes to the discussion of military applications. If space-based power is used for military logistics, it’s unlikely that it will be of the microwave variety — the power density is far too low to be practical for many of the envisioned needs. Lasers are more likely (though they will still not be a cost-effective weapon, despite the paranoia of some who will oppose the concept).

Also, in the discussion on launch costs, they didn’t spend enough time discussing the suborbital route, though they mentioned it. And while there was never much prospect of Gene Myers launching ETs into orbit, the chance that it will happen now is essentially nil, so the discussion of Space Islands is (at best) anachronistic. A description of Bob Bigelow’s activities with his orbital facilities, which weren’t mentioned at all, would have been much more useful and relevant to the reader.

[Update a few minutes later]

There seems to be a push on to get the Obama administration to adopt SBSP as a new energy initiative. Given all the other energy alternatives they want to chase (wind, terrestrial solar, etc.) why not? Even if it doesn’t pan out, it could result in lower launch costs for other things, which (as the report points out) are a prerequisite.