What is the difference b/w geo-stationary and geo-synchronous orbits?These orbits are used for satellite com:?
409966
A geostationary orbit is when a satellite circles earth in the EQUATORIAL plane in an orbit in the same direction of Earth's rotation and with a time period (time taken to complete one revolution) equal to that of the earth. In simple terms, the satellite stays over the same spot all the time.\n\nA geosynchronous orbit may have a different period, and may be over different spots at different times.
195846
the people above are very close to correct.  \n\na cylcrtronIt is a form of particle accelerator that uses a large magnetic field to have charged particles travel in a circle while an electric field drives then to travel faster and faster... \n\na synclotron is the same thing only it has a computer chip that changes the electric feild so that it can drive the particles faster when the reach levels where relitivity plays a role
811878
HI \n      \n              YOUR QUESTION IS PLACEMENT OF SATELLITE AROUND THE EARTH. BEFORE GOING IN DETAIL YOU NEED TO UNDERSTAND GRAVITY. GRAVITY IS THE MAGNETISM OF EARTH THAT TRY TO ATTRACT ANY OBJECT NEAR THE EARTH WEATHER IT IS ON THE EARTH OR IN THE SPACE.\n       BECAUSE OF GRAVITY ONLY MOON KEEPS CIRCULATING THE EARTH.\n       \n            IN NORMAL PHYSICS RULES SAYS ANY OBJECT IN SPACE HAS ATTRACTION TOWARDS EACH OTHER, AND IT IS INVERSELY PROPORTIONAL TO THE SQUARE OF DISTANCE BETWEEN THEM.AND EQUALLY  PROPORTIONAL TO THE MASS OF THEM     \n      \n             SO NOW WHEN ANY SATELLITE IS READY TO BE LAUNCHED THEN IT WILL BE CALCULATED ACCORDING TO THEIR MASS SO THEY GET PERFECT DISTANCE. SO WITH SPACE CRAFT NOT THIS SATELLITE WOULD BEEN TAKEN TO SUITABLE DISTANCE AND BY USE OF ROBOTIC HAND IT WILL BE LAUNCHED IN IN SPACE, ONCE IT GETS IN ORBIT OPEN UPS ITS WINGS WHICH TAKES SOLAR ENERGY FOR MAKE THEIR PARTS TO BE WORKED.\n         \n           NOW OTHER RULE OF PHYSICS WILL WORK HERE THAT UNLESS AND UNTIL ANY EXTERNAL FORCE INTERACT WITH ITS MOTION NONE OF THE BODY WILL CHANGE ITS DIRECTION. SO SATELLITE KEEPS ON CIRCULATING AROUND EARTH LIKE MOON AND WORKS ON SOLAR ENERGY.
693642
The orbital velocity of the satellite depends on its altitude above Earth. The nearer Earth, the faster the required orbital velocity. At an altitude of 124 miles (200 kilometers), the required orbital velocity is just over 17,000 mph (about 27,400 kph). To maintain an orbit that is 22,223 miles (35,786 km) above Earth, the satellite must orbit at a speed of about 7,000 mph (11,300 kph). That orbital speed and distance permits the satellite to make one revolution in 24 hours. Since Earth also rotates once in 24 hours, a satellite at 22,223 miles altitude stays in a fixed position relative to a point on Earth's surface. Because the satellite stays right over the same spot all the time, this kind of orbit is called "geostationary." Geostationary orbits are ideal for weather satellites and communications satellites. \n\nIn general, the higher the orbit, the longer the satellite can stay in orbit. At lower altitudes, a satellite runs into traces of Earth's atmosphere, which creates drag. The drag causes the orbit to decay until the satellite falls back into the atmosphere and burns up. At higher altitudes, where the vacuum of space is nearly complete, there is almost no drag and a satellite can stay in orbit for centuries (take the moon as an example). \n\nSatellites usually start out in an orbit that is elliptical. The ground control station controls small onboard rocket motors to provide correction. The goal is to get the orbit as circular as possible. By firing a rocket when the orbit is at the apogee of its orbit (its most distant point from Earth), and applying thrust in the direction of the flight path, the perigee (lowest point from Earth) moves further out. The result is a more circular orbit
246461
No more than the earth does work orbiting the sun. An orbit has constant energy, and if it is not circular, there is a continuous process of exchanging kinetic energy with potential energy while the sum stays the same.
119951
There are two types of Sattelites. namely polar sattelites and Geosynchronous sattelites. they are classified according to the orbit that they follow.
418258
Satellite navigation was delevoped to recover Spy Satellites and the spacecraft in the early space race. The Mercury, Genini and Apallo spacecraft landed in the ocean when they returned to earth.\n\nThe splashdown area of the spacecraft would be calculated and in most cases be fairly accurate. Once in a while it would miss and take too long for the Navy to get to them and recover the craft and astronauts. Since it was Navy Ships that did the recovery they had it first and used it to improve naval navigation.\n\nThe Army saw the value of it to pinpoint unit locations in the field. This would prevent "Friendly Fire" attacks from Artillery and Aircraft. The Army requirements for accurate locations is the reason the current GPS system exists today. For many years it was off limits to the civilian world. In the early 90's the Army declassified and released the "Old GPS Technology" to the civilian world. Now its almost impossible to get lost.
137399
A comsat is used specifically as a relay. It typically doesn't have any optical equipment, which weather satelites employ.\n\nAlso, comsats typically have a geosynchronous (a.k.a. "Clark") orbit, where weather satelites typically have polar orbits so they can get a better "spread". A polar orbit lasts about 90 mins which is why you see the delay between satelite weather photographs on the news. A geosynchronous orbit makes the satelite appear steady from the earth, thus able to act as a relay.
514325
When a satelite is launched, it is put in a eliptical orbit.  Depending upon the country which launches, then it is pushed to a particular geo-static position to meet the requirements of that country.  In the geo-static position, it would appear as if it is not moving since earth also moves along the same path.
208174
Types of satellites? Well there are many ways of classifying satellites:\n\nStabilisation\nSatellites have to be stabilised so that they can always point in the direction they want to be pointed in and so that they can thrust in the right direction etc. You can have 3 axis stabilised or rotational stabilisation (where one bit spins, like the solar panels, and one bit is de-spun, like the dishes)\n\nFunction:\nMilitary, earth observation, solar observation, deep space exploration, communication (Satellite TV & cell phones) are some examples of different satellite functions\n\nOrbit:\nYou can have satellites in many different orbits. Near Earth Orbit, where it orbits at a low altitude (e.g. 200miles, time to complete 1 orbit = 90 minutes), Geostationary orbit (orbit period = 24 hours), Highly Eliptical orbit (for communications in high latitudes). Lagrange orbit (satellite stays in the same place relative to the sun&earth)\n\nYou can find out more on any of these with a simple google search on their names
912790
Here are some of the questions you need to answer first. Is this a geosynchronous satellite (which means stationary with respect to our view from earth), or a low earth orbiting (LEO) satellite. LEO satellite goes around the earth, typically once every 90-100 minutes. Are the signals powerful enough to do it from your home satellite dish, like that of DirecTV. Do you know the frequency? Do you know where in space it is? There are web sites where you may be able to find the locations of these satellites. Do you have the right equipment, e.g. descrambling signals that may be scrambled. Trying to install a DishTV or DirecTV dish all by yourself is the best exercise to gain some experience in this.
158085
- Ground Stations (also known as the "Control Segment") \n\n- These stations monitor the GPS satellites, checking both their operational health and their exact position in space. The master ground station transmits corrections for the satellite's ephemeris constants and clock offsets back to the satellites themselves. The satellites can then incorporate these updates in the signals they send to GPS receivers. \n\n- There are five monitor stations: Hawaii, Ascension Island, Diego Garcia, Kwajalein, and Colorado Springs.\n- Let me know if you want more details...\n----------------------------
60264
Our moon is locked in what is known as a geo-synchronous orbit. For millions of years the angular momentum has stablized the moon to provide very little loss of energy between earth and moon. This does not account for the influences that the moon has upon our oceans though. (Tides) Our solar system has "moved about" for many millions of years to allow for efficient energy transfers between baryonic masses.  This is not unlike a person who sit's in a chair and move's about to become more comfortable.  Peace
743465
The Sun is orbiting the center of the Milky Way galaxy at something like 200,000 miles per hour. At the same time the Earth is orbiting the Sun at 66,000 miles per hour. At the same time the Moon is orbiting the Earth at about 2,100 miles per hour. And when the Apollo space craft were orbiting the Moon, they did so at about 3,800 miles per hour.\n\nThe reason Earth can orbit the moving Sun is that both the Earth and Sun share the motion of the Sun around the galaxy. It is kind of like playing catch in a moving car. The fact that the car is driving 65 MPH is no problem for you to throw the ball back and forth just like you would in a parked car.
330241
Well the moons rotation is not a problem because it is tidally locked with the earth. It always has the same face pointing towards to earth.\n\nThere are a few reasons why it isn't practical to use it as a satellite. As has been mentioned above it is expensive to get there, and it is far enough away to have a significant delay in transmission.\n\nApart from that, there is another reason. When we deploy satellites we generally want to have extremely precise orbits. We may want a geostationary orbit, so the satellite is always in the same position relative to the earth, or we may want a satellite that covers the whole earth at one time or another. With the moon we have absolutely no control over its orbit, so unless you're lucky enough to have it in exactly the right orbit for you (highly unlikely), it's pretty useless.
250001
The longest period artificial satellite I can think of is Ulysses, which orbits the Sun every 6.2 years.  If you're discussing one that orbits the Earth, I'm not sure.  There's SOHO which, at the L1 point, goes around the Sun with the Earth in one year.
151403
Orbits are stable. If you have a little rocket in orbit and you suddenly jetteson the boosters, the boosters will stay in orbit even though you're not using them. The only reason objects eventually fall back to earth and burn up in the atmosphere is the atmosphere itself. The (very very tiny amount of) air friction the orbiting object is exposed to slows the oblect down. This lowers the altitude slightly, exposing the object to even more resistance. This is a runaway affect, causing the object to eventually fall out of the sky.\nOh, for your first question: Not counting junk, the earth posseses 1 natural sattelite (the Moon) and thousands of artifical sattelites (for TV, GPS, phone, etc.). Counting junk, the number extends into the billions. That's right, I said billions - that's not a typo of millions.