RussellMc wrote: >> So why is directional bad, considering emissions from the sun come >> from a tight and well known direction? It seems that exploiting this >> directionality would be useful for signal to noise ratio. > > The sun tends to move, or seems to to an earth bound observer, at > least here in NZ :-) Right. He said this was for a "solar observatory", so I figured they'd kno= w how to track the sun as they almost certainly are already doing it with other sensors. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .