| Subject: Re: CPU Temp Spikes |
| From: "Seti Cruncher" <SetiCruncher@"NOSPAM"WildMail.com> |
| Date: 04/03/2004, 04:25 |
Awesome, Thats some intensive crunching. Thanks, Mike.
SC
Found it!
"Let's look first at the most computationally intensive portion of the
calculation. The first job is to "de-chirp" the data
- that is, to remove all the effects of the doppler acceleration. At the
finest resolution, we have to do this a total of 20,000 times, from -10
Hz/sec to +10 Hz/sec in steps of .002 Hz/sec. At each chirp-rate, the 107
seconds of data is de-chirped and then divided into 8 blocks of 13.375
seconds each. Each 13.375 second block is then examined with a bandwidth
of
.07 Hz for peaks (that's 131,072 tests (frequencies) per block per chirp
rate!)
This is a LOT of calculation! In this first step, you computer does about
200 billion calculations!"
http://setiathome.berkeley.edu/about_seti/about_seti_at_home_4.html
Mike