Yes, AFAIK GPS requires accurate time to function. Ortwin
On 4/19/08, Brandon Kruger <[EMAIL PROTECTED]> wrote: > On Sat April 19 2008 5:29:50 pm Richard Guest wrote: > > Yeah, it's an interesting idea. > > I read something similar on Evil Mad Scientist > > http://www.evilmadscientist.com/article.php/seismometry2 > > > > The detection/pinpointing part requires both accurate detection of shaking > > and timing - obviously the timing is critical for triangulation. > > > > I think the *cool* factor for something like this would be the ability to > > measure a persons actual physical experience of an earthquake. There are > > *lots* of existing seismometers that will do the *fixed* point detection a > > whole lot better, but none (that I know of) that will be (relatively) > > unobtrusive to the users daily life and still give an actual measurement > of > > physical shaking intensity. > > > > You shouldn't have to wait that long for e/q info... In New Zealand the > > news media mostly regurgitate what we post on http://www.geonet.org.nz/ > > There's near-realtime shaking info on the front page, and if there's > > actually an earthquake people can submit a "Felt Report" to tell us how > > they experienced it. > > It would be really cool to see how a personal accelerometer trace > > correlates to the fuzzy-logic of the felt report! > > > > > > End thoughts... > > > > -- > > Rich > > > > On 20/04/2008, Brandon Kruger <[EMAIL PROTECTED]> wrote: > > > After recently having a 5.2 earthquake here in the Midwest, I realized > > > the potential in the Openmoko for detecting/pinpointing earthquakes. > > > What this > > > is mostly dependant on is the accuracy of the accelerometers in the > > > Freerunner. From what I've read, Macbooks' accelerometers and detect > and > > > measure earthquakes fairly accurately. [1] If the Freerunner's > > > accelerometers are precise enough and it could be attached to a fixed > > > ground, > > > we could use GPS to retreive an accurate location and record and upload > > > accelerometer data to a database. Many different devices running this > > > could > > > provide intensity levels at many different locations and (at least > fairly > > > accurately), pinpoint an epicenter. This data could become useful to > > > researchers and would provide information about an earthquake faster > than > > > almost any news network would provide. > > > > > > Thoughts? > > > > > > [1] http://www.suitable.com/tools/seismac.html > > > > > > > > > -- > > > ---- > > > Brandon Kruger <[EMAIL PROTECTED]> > > > http://onedollarlinux.com > > > BLOG - http://onedollarlinux.com/personal/ > > > > > > Please avoid sending me Word or PowerPoint attachments. > > > See http://www.gnu.org/philosophy/no-word-attachments.html > > > > > > _______________________________________________ > > > Openmoko community mailing list > > > community@lists.openmoko.org > > > http://lists.openmoko.org/mailman/listinfo/community > > Wouldn't GPS provide an accurate time? I thought GPS sends its own official > time, like an atomic clock. I could be wrong. Anyone know more about this? > > -- > ---- > Brandon Kruger <[EMAIL PROTECTED]> > http://onedollarlinux.com > BLOG - http://onedollarlinux.com/personal/ > > Please avoid sending me Word or PowerPoint attachments. > See http://www.gnu.org/philosophy/no-word-attachments.html > _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community