AVR-Chat

there are many products and service providers in this field now. I work in that field. GPS is rarely used due to no-sky-visibility, high cost, battery life. The more popular techniques are bar codes and RFID readers at choke points and portals. The location of the  conveyance (truck, rail, container ship) is known, and other systems know what item is on what conveyance.  The shipping industry is doing these services for premium rates, for perishables like lobsters and high value cargo. Mostly in southeast asian ports and places where employee crime is high.


----- Original Message ----- 
From: David Collier <from_yahooAVRchat@dexdyne.com> 
Date: Friday, October 26, 2007 5:07 am 
Subject: Re: [AVR-Chat] GPS for tracking 
To: AVR-Chat@yahoogroups.com 

> rishi. 
> 
> If you're concerned about urban areas, you can go for something 
> cheaperthan GPS, and which doesn't need sight of the sky. 
> 
> you could look for a cellphone base station number 
> you could try to identify a local FM station 
> 
> However there are new GPS devices around with very good sensitivity, 
> which might do the job you want. 
> 
> You should be able to get the GPS function for less than your 
> budget, but 
> you may not have allowed enough for boxes, batteries, CPU, etc. 
> 
> David 
> 
> 
> 


[Non-text portions of this message have been removed]