AUTOMATIC VEHICLE LOCATOR

INTRODUCTION
Is your car or a vehicle stolen or is it not visible in the thickest snow or is one among the several cars present?
Do you want to know the arrival of the bus for which you are waiting?
Are your children going alone in a vehicle and you want to track their moments?
Does your cargo consists of costly load and want to protect them?
Do you want to keep track of your little playing kids about where they are?

THE SOULTION OF ALL ABOVE QUESTIONS IS AVL TECHNOLOGY
AVL TECHNOLOGY
It is a computer based vehicle tracking system.
Acts as EMERGENGY COMMUNICATION.
AVL Uses GPS Technology for Tracking.
Automated Vehicle Locator (AVL) systems use satellite and land communications to display each vehicle's location, status, heading, and speed on the computer’s screen.
TRACKING SYSTEMs 
) PASSIVE TRACKING
The Passive Tracking System modality refers to stand-alone GPS Receivers, which store data for further process.
Passive systems are typically limited to vehicle tracking only.
REAL TIME TRACKING
Real Time Tracking Systems are based on mobile stand-alone terminals which combine GPS and GSM technology to determinate and transmit their position.
A two-way wireless communication page link connects the unit with the control center at all times.
Portable GPS tracking device can be used as an emergency cellular phone with speed dialing for two -way voice communication.
WORKING OF A GPS BASED AUTOMATIC VEHICLE LOCATOR
The GPS satellites locate the transit vehicles by sending out GPS signals to be picked up by vehicles GPS UNITS.
The GPS unit absorbs the signals and gives radio signals to the RADIO system.
The RADIO systems receive the vehicle GEO - LOCATION coordinates and transmits this radio signals to communication center.
The communication center receives this information and uses it to determine the location of transit vehicle and sends this to dispatch stations and other stations for further analysis of the information.