Artificial Satellites

Sputnik 1 weighed approximately 83.6 kg (about 183 lb)

This allows them to see the entire surface of the Earth. The Earth is rotating East to West. (Or West to East if you were the satellite.) If you placed a satellite into an East-West orbit, it would not see the polar regions. If it were high enough (geo-stationary), it would only see one spot on the Earth. By using North-South (polar) orbits, the satellites will, after several orbits, be able to see the entire surface of the Earth.

A GPS satellite. GPS stands for Global Positioning System. The NAVSTARS orbit earth, and emit microwave signals that are received by GPS receivers, which electronically translate the output from the satellites into realtime global position and precision time of day data.

There is no example of a GPS satellite, other than a GPS satellite. The United States Government Department of Defense operates the Global Positioning System. It is available for use by citizens of any nation. It is provided free of charge, as a public service to the world.

The United States Government is the number one largest contributor of funds, free services and open data meant to make the world a better place. The United States is the largest global contributor to advanced technology, humanitarian international law, peace, justice and truth.

The global positioning system is only one example of the incalculable good done by United State's institutions and government.

Mercury

That depends on how you define satellite, One definition of the word satellite is a body that orbits a larger body. If you take this as the definition of satellite then the answer to our question is millions out there in space.Another definition of satellite is a manufactured vehicle intended to orbit the Earth. This definition makes our count much less because it includes only spacecraft and not debris that orbits the Earth. The Goddard Space Flight Center's lists 2,271 satellites currently in orbit. Russia has the most satellites currently in orbit, with 1,324 satellites, followed by the U.S. with 658.

Explorer One launched on January 31st 1958.

Satellite dishes are used to enhance signal reception from a satellite. They are highly directional which means they must be accurately pointed towards what ever signal is wanted.

The larger the dish, the more fine tuned the signal will be.

Antenna's measure reception in Db's much the same as you measure sound. You can witness the Db Gain of your dish if you pointed it towards a noisy road or vehicle then to walk in front of the dish the sounds would be directed and amplified.

You could probably also take of the arms of the dish and use it as a sled or possibly a small raft of sorts.

Inertia. The moon is constantly "falling" towards Earth, but it's also moving sideways so fast that it constantly misses and therefore remains in orbit.

In order to orbit the Earth, an object must have a velocity which will carry it around the Earth as gravity tries to pull it down. The speed required is called the "escape velocity" and is at least 25,000 mph (11.2 km/sec). Artificial satellites are placed atop large rockets which when fired provide the energy to accelerate the satellite into orbit.

There were several unsuccessful attempts by both the USSR and the USA before

the first one that successfully achieved orbit.

The first successful one was launched by the USSR, from the Baikonur Kosmodrome

in Kazakhstan, on October 4, 1957, and it stayed up for about 3 months.

The purpose was to demonstrate that the country could launch the necessary

weight, and achieve the necessary pinpoint navigation, to plant a nuclear warhead

anywhere in the world they wanted to.

Again, the USSR succeeded first.

They could use an engine with a greater specific impulse

No, it was far too crude for that.

Sputnik 1 was mainly to prove that a man-made object could be put in orbit and remain functioning there.

the name of the first satellite is Sputnik

both have their pros and cons cable TV is more reliable in storms and snow were satellite will go out if snow builds up on the dish

in theory HD on cable TV should be better but isn't because of the amplifying system out on the hard line outside so its more for what u what at your home

The United States' fears of Sputnik 1 were based on the premise of a Soviet-American pending missile gap. The reasoning went that if the Soviets could launch Sputnik into orbit, the technological threshold for intercontinental ballistic missiles laden with nuclear warheads was now crossed. However, and ultimately a missile gap never came to exist between the two powers suggesting American paranoia.

"They convert solar energy to electricity,this fuels all the activities of the satellite."

your wrong. yes they use solar energy to power the electrical equipment, however, they also have fuel to power the booster engines to realign them when going off course.

The fuel used to power the engine(s) is typically hydrazine (N2H4).

The first man-made object to successfully be placed in Earth orbit was dubbed "Sputnik".

It was launched from the Baikonur Cosmodrome in Kazakhstan ... part of the USSR at

the time ... on October 4, 1957.

Sputnik made schools modernize their curiculums. The advanced studies in engineering had to be taught. Because of Sputnik there was new methods of teaching. Students could learn this technology.

Once a satellite is launched into orbit, the force of gravity tends to pull it toward the Earth. But by moving fast enough, it falls in a curved path and circles the Earth. So orbit is something like a controlled fall. If a satellite does not move fast enough, it will eventually spiral closer to the Earth and burn up in the Earth's atmosphere.

The same balance of gravity and speed keeps the moon and the International Space Station in orbit.

This answer was found at the site of: http://www.boeing.com/companyoffices/aboutus/wonder_of_flight/iss.html

Explain how the remote sensing satellites examined the earth from the space?

If a satellite appears to move in the sky, then the ground station antenna has

to keep moving in order to follow it, and the satellite will be below the horizon,

invisible, and unusable for half the time over the long run. That would really put

a crimp in the operation of all the little 2-ft satellite TV dishes on top of garages.

It started the Space Race between the United States and the Soviet Union.

Astronomy is the study of heavenly bodies.

The smallest satellite was also NASA's first micro-satellite launched from Alaska on November 20, 2010. The satellite's name was FASTSAT or the USA 220.