Sri Lanka has started using satellite technology to monitor the movements of buses in a bid to "detect and control misdeeds" committed by drivers, a media report said.
National Transport Commission (NTC) director Chandrasiri Weerasekara said Global Positioning System (GPS) is being used to detect buses that run at high speeds and at unacceptable low speeds, ignore stipulated bus stops and unnecessarily stop for long periods of time, the Daily Mirror reported. The buses would be monitored to ascertain whether they run according to time tables and whether they follow the stipulated speed limits, said a statement by the government information department.
The movements of the buses would be displayed on digital screens at monitoring centres, and errant drivers would be instantly advised to follow rules over satellite phones placed in the buses. There are many different types of satellites orbiting the earth over our heads. Some are used for television, others for telecommunications, and some satellites are top secret and few people know what they are used for. Satellites are brought into space by space shuttles. They are accelerated to the speeds needed to achieve orbit by large rockets. Once in space, the satellite is subjected to two main forces.the gravitational pull of the Earth is greater than the centrifugal force, the spacecraft drops back. This will happen when the orbit velocity from the rocket is insufficient.
National Transport Commission (NTC) director Chandrasiri Weerasekara said Global Positioning System (GPS) is being used to detect buses that run at high speeds and at unacceptable low speeds, ignore stipulated bus stops and unnecessarily stop for long periods of time, the Daily Mirror reported. The buses would be monitored to ascertain whether they run according to time tables and whether they follow the stipulated speed limits, said a statement by the government information department.
The movements of the buses would be displayed on digital screens at monitoring centres, and errant drivers would be instantly advised to follow rules over satellite phones placed in the buses. There are many different types of satellites orbiting the earth over our heads. Some are used for television, others for telecommunications, and some satellites are top secret and few people know what they are used for. Satellites are brought into space by space shuttles. They are accelerated to the speeds needed to achieve orbit by large rockets. Once in space, the satellite is subjected to two main forces.the gravitational pull of the Earth is greater than the centrifugal force, the spacecraft drops back. This will happen when the orbit velocity from the rocket is insufficient.
If centripetal and centrifugal forces are equal, the object will orbit the Earth. If the induced velocity is too much, the gravitational pull of the Earth would be overcome, and the object goes into solar orbit. At an even higher velocity, the object can escape from the gravitational field of the sun, and will then become lost in outer space. Therefore, calculations for satellite orbits must be very precise. It would be very bad to have such an
expensive piece of equipment get lost in outer space. The period of a satellite is how long it takes to complete one circuit around the earth. The period of the earth’s orbit around the sun takes roughly one year.To simplify accurate navigation, the United States Department of Defense came up with something called the Global Positioning System or GPS. This is a radio based navigation system that gives three dimensional coverage of the Earth 24 hours a day. The system is very accurate. In some cases, surveyors can use GPS to get measurements down to a centimeter.
expensive piece of equipment get lost in outer space. The period of a satellite is how long it takes to complete one circuit around the earth. The period of the earth’s orbit around the sun takes roughly one year.To simplify accurate navigation, the United States Department of Defense came up with something called the Global Positioning System or GPS. This is a radio based navigation system that gives three dimensional coverage of the Earth 24 hours a day. The system is very accurate. In some cases, surveyors can use GPS to get measurements down to a centimeter.
Since it was initially designed as a defense system, it encounters few problems with jamming
and interference. The government has spent over $12 billion dollars to build the system. It
appears to be worth it because the system works very well.
