advantiges and disadvantages of a satelite?
83940
Advantages: Bring communication from the outside world to those who are isolated by geography or political repression but have the necessary receiving equipment. Such communications can educate; can save lives by warning about impending natural disasters; can inspire change by relating the lives of those in freer societies. Imaging and directional RF receiving satellites can help search and rescue, evacuation planning. \nDisadvantages: Every potentially advantageous function can be used disadvantageously. Can enable repressive regimes to propagandize, spy, direct weapons fire.
123930
Atmospheric distortions causes difficulties in truly viewing far away objects and the farther they are the greater the distortion. That is why observatories are often built high up in mountains to lessen interference from atmosphere as well as light pollution. Ideally satellites are left in orbit in space function best of all without these influences and the best pictures taken of stars and galaxies are achieved by these.
35284
RF Advantages:\n1. Not line of sight \n2. Not blocked by common materials: can penetrate most solids and pass through walls \n3. Longer range \n4. Not light sensitive \nNot as sensitive to weather/environmental conditions\n\n\n\nRF Disadvantages:\n1. Interference: communication devices using similar frequencies - wireless phones, scanners, wrist radios and personal locators can interfere with transmission \n2. Lack of security: easier to "eavesdrop" on transmissions since signals are spread out in space rather than confined to a wire \n3. Higher cost than infrared \n4. Federal Communications Commission(FCC) licenses required for some products \n5. Lower speed: data rate transmission is lower than wired and infrared transmission
937133
There are no public system that allows for viewing live satelite images.\n\nSorry
897131
check this out pal\n\nhttp://www.satmania.com/eng/satchannels/5_0e/packages/discovery_channel
601886
It depends of the bandwidth capability of the satelite, and the bandwidth usage of each channel.
567127
The main advantage is a somewhat "fixed" location in the sky relative to the Earth, and relative ease in repositioning them into other fixed positions. There are also some advantages to lower orbits. \n\nGPS satellites are NOT geostationary.  They rely on precise on board time signals and precise knowledge of their orbital ephemerii and a large enough "constellation" such that 3 or more are above the horizon and able for your receiver to pick up at any point in time over nearly the whole planet. \n\nWith a sophisticated control system you can make do with several low orbiting satellites.  The advantage with a low orbit is they are cheaper to launch, and can cover a broader range of latitudes ( geostationary orbits MUST orbit over the equator to be geostationary.  That means at higher latitudes they are lower on the horizon.  At some point they become unusuable, so are not suitable for high bandwidth or reliable communications in places like northern Europe or Russia.) Geo satellites would make EXCELLENT relay satellites for constellations of lower orbiting spacecraft, permitting spacecraft to spacecraft communication. Instead of having to relay between several to get around the globe (*) You could go up to a geo, over to another geo and back down to the other low orbiter and get almost anywhere.  You might need two hops between geos in some circumstances.\n\n(*)which would also require a much more densly populated constellation.  Iridium was named that because the original plan was to have as many satellites as the element Iridium has electrons; 77!
534368
the satelites of the sun are planets \nthe satelites of the earth are moons\nthe satelites of the moon are asteroids
150431
in space there are negative effects such as loss of bone mass and gradual weakness due to the absence of gravity.
154153
There isn't one.  You would have to pay a company a lot to have a satalite tasked to a certain location at real time.  Google maps and google earth do not use real time images. They are no older then 3 years though.  You can also try live.local.com, but again it is not real time.
1053782
This is the best I have ever used, plus it uses real satelite pictures: http://earth.google.com
1168018
It is a good idea, though the GPS should be really inconspicuous. It was used by my team in a war game played in India (Asia). Hope u know where it is!!\nWe won the game so easily, but in real life the PoW are stripped and searched, so using it in military is out of qustion. Only a crazy general would allow it, but I liked your idea.\nGood to have such bright, intelligent questions asked.
1009085
Google earth works really well...just have to download it....but it wont be in real time everytime you use it..it sounds like you want it for security purposes...that I guess you would need a keyhole satellite for!!!
313149
7 satelites at least.\nFiring nuke? not necessary..the nukes are carried by vehicle.... totaly undetectable....and so much more cheaper...
360987
Are you surprised that there are mobile phones with satellite navigation?\nI  hate to answer a question with another question, but you let me no choice
999938
One of the biggest risks in space is exposure to radiation. Highly-energetic particles - called cosmic rays - are constantly zooming through space. These particles, when they interact with the cells in our body, can cause these cells to mutate and form cancers and tumors. The same thing can be said for the other forms of radiation, most of which come from the sun but some of which comes to us through interplanetary space. These are the ultraviolet and infrared rays given off by the sun, as well as other atomic and nuclear particles which have the same affect as the cosmic rays mentioned before. These radiation also can adversely affect any electronic equipment - satellites, space shuttles, etc. We are protected from a majority of these rays and particles by the Earth's atmosphere; there is no such protection in space.\n\nAnother consideration is the bits of dust that are drifting about out there. These grains (micrometeorites) are extremely tiny but have a velocity which can - sometimes - penetrate a spacesuit or ship. Getting hit with one probably won't be terrible but, a few hundred can severely damage a spacesuit, shuttle or whatever equipment might be lying in their path.
971285
For a small satellite we normally consider the following parameters:\nattitude determination and control \npropulsion \nelectrical power supply \ntelemetry, tracking, and command \ncommand and data handling \nstructure, adapter \nthermal control \n added to all this is cost of satellite and cost of launching. Usually such a small satellite stay in orbit between 6 and 18 months.