> it’s basically reflecting a laser off its own sail I see - thanks! But how is the sail supposed to modulate the reflected signal? At ~2 baud, you could do it

> it’s basically reflecting a laser off its own sail I see - thanks! But how is the sail supposed to modulate the reflected signal? At ~2 baud, you could do it with a minute attitude adjustment; but nobody's said this probe has any attitude-adjustment capability. Maybe the innovative sail material has reflectivity that can be altered electronically? But they didn't mention that in the article.