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Satellites orbit the earth doing our bidding in ways that enrich the lives of almost all of us. Through electronic eyes from hundreds of miles overhead, they lead prospectors to mineral deposits invisible on earths surface. Relaying communications at the speed of light, they shrink the planet until its most distant people are only a split second apart. They beam world weather to our living room TV and guide ships through storms.
Swooping low over areas of possible hostility, spies the sky maintain a surveillance that helps keep peace in a volatile world. How many objects, exactly, are orbiting out there? Todays count is 4, 914. The satellites begin with a launch, which in the U.
S. takes place at Cape Canaveral in Florida, Nasa's Wallops Flight Center in Virginia, or, for polar orbiters, Vandenberg Air Force Base in California. One satellite in 20 is crippled by the jolt of lift-off, or design the inferno of a defective rocket blast, or is thrust into improper orbit. A few simply vanish into the immensity of space.
When a satellite emerges from the rockets protective shroud, radiotelemety regularly reports on its health to round-the-clock crews of ground controllers. They watch over the temperatures and voltages of the crafts electronic nervous system and other vital organs, always critical with machines whose sunward side maybe 300 degrees hotter than the shaded part Once a satellite achieves orbit that delicate condition in which the pull of earths gravity is matched by the outward fling of the crafts speed subtle pressures make it go astray. Solar flares make the satellite go out of orbit. Wisps of outer atmosphere digits speed. Like strands of spiderweb, gravity files of the earth, moon, and sun tug at the orbiting space farer. Even the sunshinessoft caress exerts a gentle nudge.
Should a satellite begin to wander, ground crews fire small fuel jets that steer it back on course. This is done sparingly, for exhaustion of these gases ends a crafts useful career. Under such stresses, many satellites last 2 years. When death irony a second away, controllers may command the craft to jump into high orbit, so it will move up away from earth, keeping orbital paths from becoming too cluttered. Others become ensnared in the gravity web; slowly they are drawn into gravitational that series space graveyards.
A satellite for communications would really be a great antenna tower, hundreds or even thousands of miles above the earth, capable of transmitting messages almost instantaneously across the oceans and continents. Soon after the launch of ATWS- 6, the Teacher in the sky, (a satellite designed to aid people) NASA ground controllers trained its antenna on Appalachia. There is brought evening college classes to schoolteachers whose isolation denied opportunity for advancement. The use of Satellites is growing rapidly and so is the different jobs for them.
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Research essay sample on Ground Controllers Satellite Orbit
