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--></style></head><body><div><span title="spike66@att.net">spike</span><span class="detail"> <spike66@att.net></span> , 11/2/2014 7:17 AM:<br><blockquote class="mcnt mori" style="margin:0 0 0 .8ex;border-left:2px blue solid;padding-left:1ex;"><div class="mcnt"><div class="mcntWordSection1"><p class="mcntMsoNormal"> </p><p class="mcntMsoNormal">If they can track a mortar round, then they can keep a laser focused on a launch vehicle. And if they can build one of these, they can build many, and focus them all on the launcher. So now if we can get a launch vehicle that can take the heat and turn it into thrust, Keith’s vision of low cost launching becomes reality.</p></div></div></blockquote></div><div><br></div>Actually, mortar rounds might be slow and easy targets. Stuff in space moves on the order of km/s, while mortars move at most a few hundred m/s ( http://hypertextbook.com/facts/2003/GabrielaBis.shtml )<div><br></div><div>Still, good tracking.<br><div><blockquote class="mcnt mori" style="margin:0 0 0 .8ex;border-left:2px blue solid;padding-left:1ex;"><div class="mcnt"><div class="mcntWordSection1"><p class="mcntMsoNormal"></p></div></div></blockquote></div><br>Anders Sandberg, Future of Humanity Institute Philosophy Faculty of Oxford University<div><br></div></div></body></html>