The Global Positioning System (GPS). ENGR097S.168 College of Engineering Penn State Christine Fogas Jeremy Hall Mercedes Hill Zachary Leuschner Nicholas Plate Mindy Sanchez. What is GPS?.
The Global Positioning System (GPS)
College of Engineering
strengths and weaknesses
GPS has become a huge part of how we navigate in vehicles.
The GPS was designed in cars to make them more safe and easier to operate.
The GPS helps not only contribute to direct navigations but the quality of the vehicle to make for safer navigations.
The typical GPS unit consists of a space segment, a control segment, and a user segment.
Each component contributes to how the GPS works.
The space segment is a constellation of two dozen satellites orbiting the earth twice every 24 hours, clocking at approximately 10,900 nautical miles above the earth's surface, which helps approximate certain locations.
In cars, GPS systems are generally quite accurate but the accuracy depends on how fast the reference receivers broadcast their signals.
Slow signals throw off the accuracy of the GPS.
When a GPS is installed in a vehicle it can calculate the exact location of the vehicle and the speed at which it vehicle is traveling.
GPS can give alternate routes and calculate a certain time it takes to reach a destination based on the current traveling speed.
In order to effectively reach a specific destination the driver enters it into the GPS database.
After a destination is recorded in the GPS, the satellite orbiting around the earth sends a signal to the GPS and calculates a route.
The signal that the GPS sends calculates a route to the specific destination.
GPS systems can also record driving activity, including the addresses, states and streets of past destinations.
Some GPS systems in cars even issue warnings when the car has a reached an unsafe speed.
The condition of a car can also be calculated and monitored by GPS technology. GPS systems can issue warnings when the battery is low or an oil change is needed.
Recently, Ford has developed a new system through GPS on the Ford Focus that will alert emergency services when an airbag deploys.
This system has emergency procedures for locating the vehicle quickly and providing help for drivers or passengers who may have become injured in a crash.
GPS is one of the most frequently and effectively used components in vehicles with modern-day technology.
GPS technology in vehicles is advancing very rapidly and has become an important method of over-land navigation.
Although GPS units aren’t perfect in performance, new models are being developed and problems with the older ones are being fixed.
Various GPS satellites orbiting earth
GPS Technology (cont’d.)
GPS Technology (cont’d.)
When the signals from the satellites take different paths to reach receiver
Leads for the signal to take longer to reach receiver
Leads to inaccuracy
Advancing technology in signal processing
Specialized Antenna involving polarizations
Separating direct (good) signals from reflected (bad) signals
More precise clocks in receivers and satellites
Programming corrections for time dilations