The Software KnightsThe Software Knights

MIT-07-04MIT-07-04 AMEER HAMZAAMEER HAMZA MIT-07-17MIT-07-17 KASHIF MURTAZAKASHIF MURTAZA MIT-07-26MIT-07-26 RIZWAN FIDARIZWAN FIDA MIT-07-30MIT-07-30 RABIA EJAZRABIA EJAZ

SATELLITE NAVIGATIONSATELLITE NAVIGATION

KASHIF MURTAZAKASHIF MURTAZA

What is a Satellite?What is a Satellite? A satellite is A satellite is

basically any object basically any object that revolves that revolves around a planet in around a planet in a circular or a circular or elliptical path. The elliptical path. The moon is Earth's moon is Earth's original, natural original, natural satellite, and there satellite, and there are many manmade are many manmade (artificial) (artificial) satellites, usually satellites, usually closer to Earth. closer to Earth.

The path a satellite The path a satellite follows is an orbit. follows is an orbit. In the orbit, the In the orbit, the farthest point from farthest point from Earth is the apogee, Earth is the apogee, and the nearest and the nearest point is the perigee. point is the perigee.

Artificial Satellites Artificial Satellites generally are not generally are not mass produced, mass produced, most satellites are most satellites are custom build to custom build to perform their perform their intended function.intended function.

NavigationNavigation

Find the position and direct the Find the position and direct the course of ship, aircraft, car, etc, course of ship, aircraft, car, etc, using satelliteusing satellite

GLOBAL POSITIONING GLOBAL POSITIONING SATELLITESATELLITE

A system was introduced to find position A system was introduced to find position on earth using satellite is global on earth using satellite is global positioning satellite systempositioning satellite system

Set of Satellites and control systems, Set of Satellites and control systems, determine location anywhere on earthdetermine location anywhere on earth

GLOBAL POSITIONING GLOBAL POSITIONING SATELLITESATELLITE

satellite-basedsatellite-based designed to provide positioning designed to provide positioning

and timing information:and timing information: developed by the US Dept. of developed by the US Dept. of

DefenceDefence 24 hours/day, 7 days/week24 hours/day, 7 days/week under any weather conditionsunder any weather conditions anywhere in the worldanywhere in the world

RABIA EJAZRABIA EJAZ

Main Components of GPSMain Components of GPS

Space componentSpace component Control componentControl component User componentUser component

Space ComponentSpace Component

24 satellites in 24 satellites in constellationconstellation

orbit every 12 hours orbit every 12 hours at 11,500 milesat 11,500 miles

4 satellites in each 4 satellites in each of 6 orbital planesof 6 orbital planes

transmit a uniquely transmit a uniquely coded radio signalcoded radio signal

equipped with equipped with onboard atomic onboard atomic clockclock

Control ComponentControl Component

ground-based monitoring and upload ground-based monitoring and upload stationsstations

control orbit and timing informationcontrol orbit and timing information

User ComponentUser Component

military and military and civilian userscivilian users

navigation and navigation and positioning positioning applications on applications on land, sea, in the land, sea, in the air and in spaceair and in space

RIZWAN FIDARIZWAN FIDA

How does GPS work?How does GPS work?

the receiver picks up the signals the receiver picks up the signals from the satellitesfrom the satellites

uses signal travel time to calculate uses signal travel time to calculate distance to the satellitesdistance to the satellites

triangulates to determine position triangulates to determine position of the receiverof the receiver

Speed of Light Speed of Light MeasurementMeasurement

measure how long it takes GPS signal to measure how long it takes GPS signal to get to usget to us

multiply elapsed time by 186,000 multiply elapsed time by 186,000 miles/secmiles/sec

time (sec) x 186,000 = miles from time (sec) x 186,000 = miles from satellite to receiversatellite to receiver

Satellite NavigationSatellite Navigation

Using GPS to positionUsing GPS to position Using a digital map for routesUsing a digital map for routes Overlaying the GPS raster over Overlaying the GPS raster over

digital mapsdigital maps

AMEER HAMZAAMEER HAMZA

Use of Satellite Use of Satellite NavigationNavigation