Frank Brickle wrote: > > > On Tue, Mar 10, 2009 at 11:10 AM, Marcus D. Leech <[email protected] > <mailto:[email protected]>> wrote: > > > OK, so I decided to use the averaging method, rather than the maximum > method. It produces reasonably good looking plots: > > http://www.science-radio-labs.com/files/spectral_example.ps > > > True, not bad. One surprise, though -- what's that notch around 1420.5? > > It definitely has an "averaged" look to it -- much like what you'd > expect from time smoothing and not frequency necessarily. One thing > that low-level heuristic grass might give you is a feeling that the > relatively flat segments are alive at least, sort of like comfort > noise during vocoder silence. If that matters. > > Frank > This is averaged both in frequency, and time. Each bin is smoothed with an integrator--needed for doing astronomical work, like showing the HI line, etc. The HI line is strong in relative terms, but in absolute terms, it's terribly weak :-(
-- Marcus Leech Principal Investigator, Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
