Dear Miklos, 1 meter precision?? If I am doing my calculations in an environment which is small lets say 1 meter by 1 meter !! this method will be useless right??
I read a paper about a precise algorithm to calculate the distance and time is one of the algorithm parameters. Regards, Islam ----- Original Message ----- From: Miklos Maroti <mmar...@math.u-szeged.hu> Date: Sunday, March 1, 2009 1:06 am Subject: Re: [Tinyos-help] Time Stamp To: Islam Mohamad Ameen Al Jarrah <g00022...@aus.edu> Cc: Janos Sallai <sal...@isis.vanderbilt.edu>, tinyHelp <tinyos-help@millennium.berkeley.edu> > Dear Islam, > > Please calculate the time stamping precision you need to get 1 meter > precision in the distance using the speed of light, and let us know. > > Miklos > > On Sat, Feb 28, 2009 at 9:50 PM, Islam Mohamad Ameen Al Jarrah > <g00022...@aus.edu> wrote: > > Thanks for the reply, > > > > well do you mean to say that it needs a lot of work and it is not > effiecient to find the distance according to the Time !! Is there a > source code that could help me to implement such an algorithm?? > > > > Regards, > > Islam > > > > ----- Original Message ----- > > From: Janos Sallai <sal...@isis.vanderbilt.edu> > > Date: Saturday, February 28, 2009 2:54 am > > Subject: Re: [Tinyos-help] Time Stamp > > To: Islam Mohamad Ameen Al Jarrah <g00022...@aus.edu>, tinyHelp > <tinyos-help@millennium.berkeley.edu> > > > > > >> It's a tough problem. RF waves travel 300 meters in a microsecond. > >> This is typically more than the communication range of the motes. > >> TEP132/133 prescribes millisecond precision timestampint. The best > >> timestamping precision you can hope for is 2-3 microseconds on > >> average, but you need to hack the radio stack code in order to achieve > >> that. Then, there's the jitter (look at the FTSP paper by Miklos > >> Maroti et al. for a list of different sources of jitter). > >> > >> Janos > >> > >> > >> > >> On Fri, Feb 27, 2009 at 3:41 PM, Islam Mohamad Ameen Al Jarrah > >> <g00022...@aus.edu> wrote: > >> > Dear All, > >> > > >> > I need to send a packet from one mote to another with a time stamp > >> where it > >> > will be used to calculate the distance between the two motes, and > >> need to > >> > send an acknowledgment back to the source also with a time stamp! > >> Can any > >> > one help me with this? > >> > > >> > Regards, > >> > > >> > Islam > >> > > >> > _______________________________________________ > >> > Tinyos-help mailing list > >> > Tinyos-help@millennium.berkeley.edu > >> > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > >> > > >> > > _______________________________________________ > > Tinyos-help mailing list > > Tinyos-help@millennium.berkeley.edu > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > > _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
