Satellites
A satellite is defined as an object that orbits or revolves around another object. In basic terms, this relationship is due to the gravitational pull of the larger object while the smaller one has enough velocity and momentum to circle the larger one (Fitzgerald &Dennis). This is a good definition if one is only speaking of the broad principles of why and how objects attract one another and where in nature this occurs. The billions of stars and planets together make up a vast network of orbiting objects that each can rightfully be called satellites. By studying the way the Universe and Solar System works, scientists have been able to send man made devices into earth's orbit to serve the needs of a technologically developing world.
We have benefitted our world by using satellite technology to preform tasks and provide a range of innovated services. The main applications of satellites are in the fields of communication, Earth Remote Sensing, weather, and scientific research. In some ways the use of satellites has made our world smaller. Satellites make it possible to establish a connection between two people that are on opposite ends of the globe via a telephone call or the use of the internet. Each of these satellites have many parts, but two parts are common to all satellites are called the payload and the bus. These groups of devices make the satellite capable of accomplishing their tasks.
An example of a communications satellite is the EchoStar 3. It is used to send TV signals to homes in North America. For this simple use of broadcasting TV through these technical machines, there are over one hundred communications satellites orbiting earth today. Communication satellites are also used as relay stations in space. People use them to bounce messages from one part of the world to another. These messages can be telephone calls, TV pictures, or even Internet connections. Many communications satellites have footprints. Communication satellites like the EchoStar 3 are in a geosynchronous orbit. This means that the satellite always stays over one spot on Earth. The area on Earth that it can see is called the satellite's footprint. For example a footprint that covers all of Africa can be used by one person to send a message to another person in Africa. One could also use communications satellites as relay stations to send messages to people over a system of satellites with many footprints.
NSSS states a few current trends in space as being “congested and contested” (NSSS, 8), which is shaping our space strategic environment as well as fueling debates for space weapons. “Congested” trend refers to the current “60 nations and government consortia that own and operate satellites and the expectation to have 9000 satellite communication transponders in orbit by 2015.
In the ontological argument, St Anselm provides an argument that is based on logic. In order to understand his argument you must first ...
C. By becoming an organ donor, you could save a life of a deserving person.
... the engineering of synthetic blood parts, and the use of growth-factor proteins have given both researchers and patients hope. Using one’s own blood via self-donations, intraoperative hemodilution (extracting blood before an operation, then dispensing it back into the body afterward), blood recycling during surgery, and designated donations are also options for patients who wish to ensure further a clean transfusion. Finally, the practice of extracting illness-fighting white blood cells from donated blood before a transfusion may filter some diseases from the donation.
There are many good reasons to give back to the community, but with the shortage of lifesaving organs being an organ donor is a perfectly good reason to assist someone in desperate need of a miracle. The U.S. Department of Health and Human Services states that 119,000 individuals are on the waiting list for a transplant, plus every ten minutes some is added to that very same list. As a result, 22 people die each day waiting for their transplant (2015). These statistics are a huge number to take into account. People waiting helplessly for a miracle to happen, and most individuals basically need to do is take action in becoming an organ donor. Individuals also have to take a look at the criteria to even be on the waiting list. People would have to be in the end stage organ failure and have seen a transplant surgeon to be even considered. Here in the United States the system they use is for one to be even considered if by the urgency of the need, their blood type, how long on the waiting list, and the best match (Clemmons, 2009). No wonder there is such a need of donors because not only they have to address the shortage of organs, but as well oneself would have to meet these criteria. People must not get discouraged in donating their precious organs, they should also come together as a community and bring awareness of the demand of organ donors needed to address these issues. The more
The idea that a satellite could be put into orbit around the Earth was introduced to the scientific community in 1903. Konstantin Tsiolkovsky showed that this could be done, but his work was all mathematical. In 1948, another Russian named Mikhail Tikhonravov talked to the famed scientist Sergei Korolev about turning this theory into an actual working device. Tikhonravov presented his ideas to the Academy of Artillery Sciences, but they refused to support the project. The Academy president Anatoli Blagonravov, however, could not get the idea that the project would have huge value out of his head. Eventually he brought the p...
It is stated in the National Blood Transfusion Service (2013) guidelines of the World Health Organization (WHO) that donor recruitment must begin from donors who belong in a low risk, safe and healthy population of a community. It is also strongly prohibited to pay any donors. The blood transfusion process is a very thorough and meticulous process to ensure the safety of the donor and the recipient of the blood unit.
What is a culture? Culture is anything consisting of a group and system. For example, culture consists of art, literature, humans, history, religion, and so on. There are many various cultures placed worldwide here on Earth. Not every culture is the same. Some cultures today still hunt and gather food like their ancestors before them. Some cultures today are more industrial and focus on progress through the world. Culture has shaped individual groups into what they are and become in the world. Although there are different ways in which culture can shape certain groups, there are a few factors that remain the same.
Sixty-Five million years ago, 70 percent of life on Earth died. The most reasonable and possible reason this happened was an asteroid. An asteroid hit the Earth very hard, and in doing this, dirt and dust from the impact stayed in the air and it blocked out sunlight, that’s why the dinosaurs died. An asteroid is a rock from outer space. Asteroids have orbited the Sun along with the planets since the solar system formed about 4.6 billion years ago, but it’s only been 200 years since we first discovered them. Meteorites are small pieces of asteroids broken off on impact with other asteroids. Most meteorites are rusty brown on the outside, have rounded edges from melting as they go through Earth’s atmosphere, and contain iron. There are 3 different types of meteorites: stony, metallic, and stony metallic.92 percents of all asteroids are stone, 6 percent are made of iron and nickel, and the rest are a combination. Some meteorites also contain gold, copper, platinum, and carbon.
In 1957 the Soviets used a missile to launch a satellite, Sputnik 1, into orbit around the earth. The arms race then became a space race as the United States rushed to launch its own satellites, some for military purposes.
It all started on October 4, 1957, when the U.S.S.R. launched Sputnik 1 into space. The Sputnik (“traveler” in Russian) was the first satellite made by mankind. It consisted in a small beeping metal ball, with a diameter of less than two feet and a weight of less than 200 pounds. The ball was small, but it started a big space race between the U.S.S.R. and the U.S. This race lasted for about twenty years and, without a doubt, it completely changed the world.
The Cold War pushed many American companies to new limits, to prove that the U.S. was far superior to the U.S.S.R. The Space Race had produced new companies, new technological advances in space and brought national pride. On July 29, 1958 congress had established the “National Aeronautics and Space Administration (NASA), a federal agency dedicated to space exploration” (History 1). NASA was the first space program created by the United States NASA was able to help the U.S. expand technology to new areas, such as creating the satellite, which is a well-used piece of machinery that is used. The first satellite ever launched by the U.S. was Tiros 1. Tiros 1 was Cylinder like machine that was able to take photos of earth from space and transmit them back to earth. Satellites today are used for telephone communication, T.V. channels and our every weather report. The space race “was seen as the next frontier”(History 1). The Space Race had inspired car designers in new designs, inspired easy flying transportation, and effect the c...
On October 4th, 1957, history was made when the Soviet Union launched Sputnik I, the first artificial satellite. The Sputnik I was only the size of a beach ball, it only weighed 183.9 lbs., and it was the marker for the “space race” between the U.S. and the Soviet Union. It was a huge technological achievement that caught the world’s attention and wound up making Americans disappointed that the U.S. did not send the first satellite into space. U.S. citizens were also concerned that if the Soviet Union could send satellites into space then they could posses the power to send ballistic missiles or nuclear weapons. Then, the Soviets raised the bar by sending Laika, the first living thing in space with a much heavier payload on November 3rd. Laika, meaning “barker” in Russian, was a stray mutt that was only three years old when she went to space. Laika was sent to space in a restrictive spacecraft that only had enough room...
GPS is a navigational aid that is satellite based. It is made up of a network of 24 satellites in orbit around the world. The first satellite was launched in 1978 and the last was put into orbit in 1994. Every 10 years another satellite is put into orbit because each satellite is made to last that amount of time. The system began as a military application but in the 1980’s the government decided to make it available to everyone, anywhere, anytime. The system finds your position by measuring the time it takes to receive the signal back to the satellite. It then does that with other satellites to triangulate your position in relation to the earth. To calculate a position in 2D the system has to be locked on to at least three satellites, but for a 3D representation you need to be locked on to at least 4 satellites. Once the position is found the GPS can calculate much more info like speed, bearing, track, distance, etc… The GPS system is very accurate; Garmin (a leader in GPS technology) states that their newest receiver is accurate up to an average of 15 meters.
The Global Positioning System consists of three sections, 1.satellites which are orbiting the planet, 2.there are numerous control/monitoring centers here on the ground, and 3. gps receivers which are used by their owners. The satellites send down signals from orbit, which are received by GPS receivers on the ground in the air or on the water, the GPS receiver then converts this information into a location longitude, latitude and altitude along with time.