Conclusion A - GPS has the biggest advantage: •Operated simultaneously•Provide excellent localisation and navigation service •Excellent development opportunity for broad range of applications References:A-GPS: Assisted GPS, GNSS, and SBAS . 2016. A-GPS: http://www.frankvandiggelen.com/. [Global positioning system: signals, measurements, and performance - https://books.google.co.uk/books/about/Global_positioning_system.html?id=pv5MAQAAIAAJ. Magnetic field - Wikipedia, the free encyclopedia. https://en.wikipedia.org/wiki/Magnetic_field. Standardization of Mobile Phone Positioning for 3G Systems.2016.http://www.slideshare.net/Dominque23/standardization-of-mobile-phone-positioning-for-3g-systems

Introduction Indoor navigation services increased his popularity in recent year. Mobile devices itself offers the opportunity of providing such services without the need of huge investment as Smartphone have pre build self magnetism with magnetic field induced at 20 sm of the surrounding environment ,able him to provide accurate reading.

GPS localization

High level GPS infrastructure

GPS network characteristics •Pseudoranges•Clocks, orbits

•Spread spectrum signals•Micro-electronics

•Indoors and instant A- GPS Magnetic fields characteristics

Accelerometer in Smart phone subdues

Newton's third law as the Earth exerts a

downward force on the device having

acceleration due to  the gravity of g=9.8 m/s2  Magnetic field

Measurements Application Data Analyses

Accelerometer & GPS App