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Artificial Satellites
Artificial Satellites are objects launched from earth to orbit earth or other planets. Satellites are used for communication, remote sensing, weather forecasting, and other purposes. This category is for questions about satellites in general or specific satellites.
1,932 Questions
Where are GPS satellite signals processed?
GPS signals are processed in the GPS unit and displayed, and they are also processed via three Global Position Satellites. All four units work together and process GPS signals (some to the satellites from the GPS, and some from the satellites to the GPS) to create an accurate position.
A satellite in geosynchronous orbit is always directly above the?
In geosynchronous orbit, it's always somewhere over the same meridian of longitude.
In geostationary orbit, it's always over the same point on the equator.
Why does GPS work in a tunnel but satellite radio doesn't?
Many GPS units will show your position based on the path you were following when the signal was lost. If you were to go into a tunnel with your GPS unit off and turn it on while in the tunnel it wouldn't show your position.
The gravitational force between objects increases as the distance between objects decreases.
What is the lifetime of a satellite in space?
It is dependent on the life of its solar panels, which supplies it energy. As long as energy is supplied it works properly.
Correct answer:
The satellite has to correct its orbit from time to time. To do that, it uses gas compressed at a small tank. When this tank is empty, the satellite loses its orbit and even burns at the atmosphere or flies in the space.
Russian scientists worked together to build the first satellite
Why does the space shuttle need tiles?
The tiles on the space shuttle form a heat shield. The shuttle enters the Earth's atmosphere at high speed, which creates very high temperatures that would burn up the vehicle if it was not protected.
What is a natural or artificial object that orbits another object called?
any object, natural or artificial, that orbits another object is called a "satellite"
Sputnik was the name of the first satellite to be launched into outer space?
by the russians. it was a hollowed out nuclear missile
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No, and furthermore, no.
Sputnik was the name given to the first man-made object to successfully
achieve low-earth-orbit, after earlier failed attempts in both the USA and
the USSR.
It was not the first intended artificial satellite to be launched, only the first to
succeed. And it didn't go anywhere near "outer space", just into thin-enough
atmosphere that it was able to stay there for a few months before it fell out of
orbit and burned up.
In witch country did the first satellite go up in space and what year was it when this happened?
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.
How was sputnik related to the cold war?
In 1957, Sputnik was the first rocket-launched space equipment to enter " outer space. " Unfortunately for the United States, it was the U.S.S.R. that took this huge landmark first step into the stratosphere, causing Americans to re-consider their assumed status as the world leader in all technology. A frightening question loomed: If the Russians are this far ahead of us in the " Space Race, " are we also behind in the nuclear arms race? After all, this was a large communist country whose leader had said only months before publicly to the U.S. -- " We will bury you !! "
Why do geographers rely on satellites to gather geographic data?
Geographers rely on satellites to gather data because it is the easiest method. In the past, they would have had to traverse the earth to map all of it.
an ellipse.
the sinewave path on flat maps is because most satellite orbits are inclined/tilted with respect to the earth's axis. so the satellite moves north/south as well as around the earth.
How do satellites help us learn about the shape of the seafloor?
By bouncing microwaves off the ocean surface.
What is microwave and satellite communication?
Satellites use Microwaves to send signals.
Does earth's gravity do any work on satellite revolving around it?
NO.
The gravity of Earth, in conjunction with the inertia of the satellite, keeps the satellite revolving around Earth.
However, the satellite doesn't get any nearer to the Earth. So, according to the laws of physics, no work is done.
(I'm ignoring the fact that satellites sometimes lose height and need to be "boosted" a bit to maintain their orbits.
Also, I'm assuming that the satellite's orbit is circular. If the orbit is elliptical the answer is more or less the same, but a bit more complicated.)
What is the telephone country code for satellite telephones?
Satellite telephones use several different country codes, depending on the company providing the service. Note that substantially higher call charges may apply for calls to satellite phones, compared to calls to ordinary land-based phones.
Inmarsat uses country code +870, primarily for ship-to-shore calls. (Inmarsat formerly also used country codes +871 through +874, but now uses only +870.)
Country code +881 is used for global satellite phones, with the next digit identifying the company: 6 or 7 for Iridium, and 8 or 9 for Globalstar. (+881 0 and +881 1 are reserved for ICO Global/Pendrell, and +881 2 and +881 3 for Ellipso, but they are not operational.)
Country code +882 is used for various international networks, with the next two digits identifying the network operator. The following networks are used for regional satellite phones:
- +882 13 = Telespazio/EMSAT
- +882 16 = Thuraya
- +882 20 = ACeS/Garuda
- +882 38 = (was assigned to Ellipso, in addition to +881 2 and +881 3)
Country codes +875, +876, and +877 are reserved for maritime mobile services, but have not yet been activated.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
Satellites orbit in the thermosphere or exosphere where there is no wind and drag is negligible.
Why do you only see a few comets?
Who discovered artificial satellite?
The Moon is the natural satellite of the Earth, so the person who discovered it was probably Ugghhh, the First Caveman. Artificial satellites weren't developed until the 1950's, and so the "discoverer" was one of the Soviet engineers who launched the first Sputnik, the first artificial satellite of the Earth.
Other planets have their own satellites. Galileo is credited as discovering the four largest satellites of Jupiter in January, 1610, when he pointed his new telescope at Jupiter.
Why must a horizontally moving projectile have a large speed to become an earth's satellite?
At lower speed, the object will fall back on the ground.
Since, earth is curved, if the object has enought speed, the object can try to fall beyond the curvature of the earth.
Thus, it will not hit ground at all.
The speed to achieve it is around 8 km/s.
If the object is faster than 11.4 km/s then the object will never return.
It is called escape velocity.
