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The satellites are the integral part of our life. In current scenario, our planet is covered with
thousands of satellites. These satellites covers every aspect of communication like- navigation,
telecommunication, television broadcasting, satellite imaginary, military communications,
Space Station, Earth's weather and climate etc. The small time delay in clock implemented in
satellites cause large delay in propagating signal and it leads to tremendous loss in
communication. This Project basically deals with detection and computation of time error on
satellite clock due to relativistic effect. The time delay is based on both special and general
relativity postulated by Albert Einstein in 1905 and 1915. The detection and computation had
been done by presenting the simulations in the MATLAB environment. The focus of project is
specially GPS satellites due to the need of better and reliable navigation system in current
scenario. Using the Simulink Environment in MATLAB a P code and C/A code have generated
and tested. These code contains timing signal and synchronization signal for GPS satellites.
Synchronizing time with precise time calculation on GPS receivers, system simulation in
MATLAB from GPS satellite transmitter to receiver will be discussed here. The atomic clock
is also discussed here which is used to measure the time delay with high level of precision
(around 10 nano-second) in satellites. Satellite Tool Kit (STK) Software a package
from Analytical Graphics, Inc. is also used in the project to model the satellite and its orbit
around the planet earth. It provides very high graphics simulation and modelling. It allows
engineers and scientists to perform complex analyses of all the physical parameters necessary
for satellite designing and communication.