Artificial Satellites

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It never let's u hide................

Generally around 200 or more miles above the Earth's surface

A GOES satellite stays seemingly motionless, hovering 35,800 km above the Earth's equator, while a POES satellite travels over multiple lines of longitude, moving around the Earth. POES is also closer to the Earth, at about 750 km above Earth.

Once a satellite is accelerated into an orbit above the atmosphere, it can "coast" because there is almost no friction in the airless vacuum to slow it down. Any contact with air particles will slow down the satellite, and might eventually cause it to lose orbital speed and re-enter the atmosphere. (To be in "orbit" around the Earth, a satellite must be going fast enough to 'fall past' or 'fall around' the Earth's curved surface, as gravity tries to pull it down again.)

It is an electronic device on board a geostat satellite to receive uplink data and picture bits,amplifying it before converting it to a downlink freqency bit stream and sending it down to earth.

Neo

You've set two different criteria ... the Earth's closest satellite is not the

oldest one. So you've asked two questions, and they have different answers:

1). The identity of the Earth's closest satellite changes frequently,

because the close ones don't last long.

2). The Earth's oldest satellite is the Moon.

Actually its not the altitude of the satellite but the resolution of the camera that is responsible for a high resolution imagery.

In fact the better resolution imagery in Google Earth comes from aerial and street-level photography.

At first, the Russians claimed she lived for 6 days and was euthanised prior to oxygen depletion.

However, in 2002 the Russians finally admitted that she died within hours, of overheating because of a failure of the sustainer unit.

No matter how you look at it, it's not a very nice way to go. Luckily, we no longer use animals for space exploration - we just use humans instead.

If a meteor was coming directly at a satellite, it could cause destruction, which can affect Earth.

Satellites placed 200 - 800 kilometers above Earth are typically used for Earth observation, communication, and scientific research. These satellites are considered low Earth orbit (LEO) satellites and offer advantages like lower latency for communication and higher resolution for imaging compared to satellites in higher orbits.

An artificial satellite used for telecommunications is not a simple passive reflector. It's actually an active radio repeater; that is, it incorporates a radio receiver and transmitter ... usually several of them ... along with their antennas. In doing its job, it receives the signals aimed at it, on the frequency that it's built for, and retransmits the information at high power back down to the surface ... for example, to all those little TV dishes on most of the houses in some neighborhoods. There are thousands of "microwave radio repeaters" all over the US, usually on the ground right next to those towers you see everywhere with the 'dish' antennas mounted on them. The TV satellite does exactly the same job as the terrestrial repeater. It just happens to be working over links of more than 22,000 miles. (With no air over most of the distance, that's actually a pretty easy job for radio engineers these days.)

In satellite communication uplink (transmission of signal from earth station to satellite ) & downlink (reception of signal from satellite to earth station) takes place TX & RX involves a finite amount of delay which is acceptable in data communication, but i audio & video TX this delay is unacceptable, overlapping/ alaising causes errors which demodulated by qpsk.

A scientific discovery that was made using photography involved the running motion of a horse. Until they photographed a horse running no one knew that when a horse runs at one point in time all four legs come off the ground.

DMSP, or Defense Meteorological Satellite Program, satellites were initiated by the Department of Defense. These satellites are used to provide important information to the military concerning weather conditions. Most commonly this information is used by the Air Force.
Strategic and tactical weather prediction.

No, it was far too crude to have any value as a spy satellite. Basically it was an experiment to see if things could be launched into orbit and made to function there.

Launching is the act of sending a vessel into space. These days, it is usually done by lighting a rocket to carry the craft from ground to orbit, but sometimes they get to orbit via a smaller rocket launched from a high-altitude aircraft.

1955-1957

There are several thousand. About 30 of them are GPS satellites, and another several dozen are geosynchronous communications satellites that provide TV programming and telephone service. There is the Hubble Space Telescope, the International Space Station, and hundreds of weather satellites.

Explorer I was the first US satellite launched January 31, 1958.

The launch of Sputnik, the first artificial satellite, by the Soviet Union in 1957 marked a significant moment in the Space Race during the Cold War. The primary country involved was the Soviet Union, which successfully sent Sputnik into orbit. In response, the United States, along with its allies, became increasingly focused on space exploration and technology development, leading to heightened competition between the two superpowers. Other countries, while not directly involved in the launch, were influenced by the technological advancements and geopolitical implications of Sputnik.

Communication satellites typically travel in a geostationary orbit, which means they maintain a fixed position relative to the Earth's surface. This orbit is located approximately 35,786 kilometers (22,236 miles) above the equator, allowing satellites to revolve around the Earth at the same rotational speed. As a result, they appear to hover over a specific point, facilitating consistent communication with ground stations. In contrast, some satellites operate in low Earth orbit (LEO) or medium Earth orbit (MEO), traveling in various orbital paths.

Direct Broadcast Satellite (DBS) is a type of satellite television system that transmits television programming directly to a consumer's satellite dish, typically installed on the roof or balcony of a home. DBS signals are broadcasted from geostationary satellites orbiting the Earth, allowing for a wide coverage area and high-quality video and audio. Subscribers receive the signal through a small dish and a receiver, enabling access to various channels and services without the need for traditional cable infrastructure. This technology has revolutionized how people access television content, offering a diverse range of programming options.