I remember Mike May discussing that on the list and don't remember many of the
technical details.
I believe some how the light was modulated to contain location data and they
had a special receiver that could decode the pulses.
I use the talking signs system while traveling to and from work and as
simple of an idea as that is it works pretty well.
On Oct 25, 2010, at 6:19 PM, Andy Baracco wrote:
> Sendero experimented with an indoor GPS type system at the CSUN conference a
> few years ago. I do not understand the tech behind it, but it somehow
> involved flourescent lights.
>
> Andy
>
>
>
> "I'm pretty good at drinkin beer."
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Scott Granados
> Sent: Monday, October 25, 2010 11:11 AM
> To: [email protected]
> Subject: Re: the gns bluetooth gps receiver for apple products
>
> I think inside buildings is probably a lost cause for any device. There are
> to many flat plains and angles to cause multipath that will totally hose
> your signal. I'm guessing that tower triangulation would be a better method
> for building navigation althgouh that will experience many of the same
> issues. I've heard of in building navigation systems that use the lights as
> navigation elements but never used this.
>
> I would like to see better accuracy outdoors primarily. Places like San
> Francisco or other big cities can be pretty difficult.
>
>
>
> On Oct 25, 2010, at 10:57 AM, Yuma Decaux wrote:
>
>> Yep, we do tend to try and justify our purchase with a good opinion.
>>
>> I still need to try it out with navigon and see if its precision can be
> documented by car and foot. Also would like to try it on difficult
> conditions such as inside buildings etc.
>>
>> best regards,
>>
>>
>> Yuma DXR
>>
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