Geostationary satellites
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Geostationary satellites orbit at an altitude of about 22,300 miles above the Earth's equator, allowing them to remain stationary relative to a point on Earth. These satellites are used for weather forecasting, satellite television, radio, and global communications. While geostationary satellites provide stable signals, they experience sun outages during March and September when the sun's interference disrupts signals for up to 24 minutes per day depending on the receiving antenna size. To maintain their position, geostationary satellites have small rocket boosters and motors onboard.
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Presentation geostationary satellites (geos)
When a geosynchronous satellite is placed directly above the Equator with a circular orbit and angular velocity identical to that of the Earth, the satellite is known as a geostationary satellite.
What is geostationary satellite
The document discusses geostationary satellites and related technologies. It provides details on:
- What defines a geostationary satellite's orbit and how it revolves with the Earth's rotation.
- The purposes of geostationary satellites including communication, broadcasting, earth observation, and military/remote sensing applications.
- The design of typical early geostationary satellites, which were spin-stabilized cylinders around 3 meters long supplemented with solar panels and communication antennae.
- Issues around limited orbital slots in geostationary orbit and conflicts between countries over access to frequencies and positions.
Geosynchronous Satellite
Geosynchronous Satellite: a slide for BMARPC lecturer cum network engineer recruitment. It was a fantastic experience. It was about satellite, classification, basic theory, difference and most importantly Bangabandhu 1 satellite!
Geostationary Satellite
Geostationary satellites orbit approximately 22,300 miles above the Earth's equator. They maintain a constant position relative to locations on Earth's surface. This allows them to be used for telecommunications and weather observation applications. Geostationary satellites have advantages like high coverage area from a small number of satellites, but also disadvantages like inability to observe polar regions and weak signals from long distances.
Satellite Applications
Satellite applications can be categorized into four main types: communication satellites, navigation satellites, observation satellites, and weather satellites. Communication satellites allow for radio, television, and telephone transmissions globally. Navigation satellites like GPS use timing signals from satellites to precisely determine location. Observation satellites are used for non-military purposes like environmental monitoring and map making. Weather satellites scan Earth with instruments to form images of cloud cover, temperatures, and weather systems.
Geosynchronous earth orbit(geo)
A geosynchronous earth orbit (GEO) is a circular orbit around Earth at an altitude of about 35,786 km, matching Earth's rotation period. Satellites in GEO orbit appear stationary relative to locations on Earth. GEO satellites provide advantages like large coverage areas and no need for ground station tracking. However, they also have disadvantages like weak signals due to the long distance traveled and poor coverage of polar regions. GEO orbits are commonly used for telecommunications, broadcasting, and weather observation due to their consistent coverage of fixed areas on Earth.
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The document discusses various types of satellites and their applications. It describes communications satellites that enable broadband internet, direct broadcasting, and fixed satellite services. It also covers earth observation satellites used for environmental monitoring, agriculture, forestry, geology, and risk management. These satellites observe the Earth's surface and collect data on topics like climate, natural resources, and natural disasters. Finally, the document lists reconnaissance satellites, astronomical satellites, weather satellites, and navigation satellites as other major categories of satellites and their purposes.
Satellites
Satellites
Introduction to Satellite Systems
o A satellite is an artificial object which is placed intentionally into an orbit of any natural satellite. Satellites are used for many purposes i.e. weather forecasting, digital transmission, scientific research and development etc.
o In a communication context, a satellite is a specialized wireless transmitter/receiver that is launched by a rocket and placed in orbit around the earth.
o A satellite can be natural, like the moon, or artificial (human made). So we can say that a satellite is an object that moves in a curved path around a planet.
o Satellite can travel around planets or around stars such as our sun. All the planets are satellites around the sun.
o Satellites which are far away from the surface of the earth can cover a wide area on the surface of the earth.
Following are the four important types of Earth Orbit satellites −
• Geosynchronous Earth Orbit Satellites
• Medium Earth Orbit Satellites
• Low Earth Orbit Satellites
• Highest Earth Orbit Satelites
Now, let us discuss about each type of earth orbit satellites one by one.
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Presentation geostationary satellites (geos)
When a geosynchronous satellite is placed directly above the Equator with a circular orbit and angular velocity identical to that of the Earth, the satellite is known as a geostationary satellite.
What is geostationary satellite
The document discusses geostationary satellites and related technologies. It provides details on:
- What defines a geostationary satellite's orbit and how it revolves with the Earth's rotation.
- The purposes of geostationary satellites including communication, broadcasting, earth observation, and military/remote sensing applications.
- The design of typical early geostationary satellites, which were spin-stabilized cylinders around 3 meters long supplemented with solar panels and communication antennae.
- Issues around limited orbital slots in geostationary orbit and conflicts between countries over access to frequencies and positions.
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Geosynchronous Satellite: a slide for BMARPC lecturer cum network engineer recruitment. It was a fantastic experience. It was about satellite, classification, basic theory, difference and most importantly Bangabandhu 1 satellite!
Geostationary Satellite
Geostationary satellites orbit approximately 22,300 miles above the Earth's equator. They maintain a constant position relative to locations on Earth's surface. This allows them to be used for telecommunications and weather observation applications. Geostationary satellites have advantages like high coverage area from a small number of satellites, but also disadvantages like inability to observe polar regions and weak signals from long distances.
Satellite Applications
Satellite applications can be categorized into four main types: communication satellites, navigation satellites, observation satellites, and weather satellites. Communication satellites allow for radio, television, and telephone transmissions globally. Navigation satellites like GPS use timing signals from satellites to precisely determine location. Observation satellites are used for non-military purposes like environmental monitoring and map making. Weather satellites scan Earth with instruments to form images of cloud cover, temperatures, and weather systems.
Geosynchronous earth orbit(geo)
A geosynchronous earth orbit (GEO) is a circular orbit around Earth at an altitude of about 35,786 km, matching Earth's rotation period. Satellites in GEO orbit appear stationary relative to locations on Earth. GEO satellites provide advantages like large coverage areas and no need for ground station tracking. However, they also have disadvantages like weak signals due to the long distance traveled and poor coverage of polar regions. GEO orbits are commonly used for telecommunications, broadcasting, and weather observation due to their consistent coverage of fixed areas on Earth.
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The document discusses various types of satellites and their applications. It describes communications satellites that enable broadband internet, direct broadcasting, and fixed satellite services. It also covers earth observation satellites used for environmental monitoring, agriculture, forestry, geology, and risk management. These satellites observe the Earth's surface and collect data on topics like climate, natural resources, and natural disasters. Finally, the document lists reconnaissance satellites, astronomical satellites, weather satellites, and navigation satellites as other major categories of satellites and their purposes.
Satellites
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Introduction to Satellite Systems
o A satellite is an artificial object which is placed intentionally into an orbit of any natural satellite. Satellites are used for many purposes i.e. weather forecasting, digital transmission, scientific research and development etc.
o In a communication context, a satellite is a specialized wireless transmitter/receiver that is launched by a rocket and placed in orbit around the earth.
o A satellite can be natural, like the moon, or artificial (human made). So we can say that a satellite is an object that moves in a curved path around a planet.
o Satellite can travel around planets or around stars such as our sun. All the planets are satellites around the sun.
o Satellites which are far away from the surface of the earth can cover a wide area on the surface of the earth.
Following are the four important types of Earth Orbit satellites −
• Geosynchronous Earth Orbit Satellites
• Medium Earth Orbit Satellites
• Low Earth Orbit Satellites
• Highest Earth Orbit Satelites
Now, let us discuss about each type of earth orbit satellites one by one.
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The document discusses different types of satellite orbits and their characteristics. A geostationary orbit (GEO) has satellites 35,786 km above the equator that rotate with the Earth's rotation, allowing them to remain stationary over one position. Low Earth orbit (LEO) satellites are 500-1500 km high and pass over positions every 15-20 minutes, requiring networks to provide coverage. Medium Earth orbit (MEO) satellites are between 8000-18000 km high and provide longer visibility than LEOs.
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There are three main types of satellite orbits:
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2) Sun synchronous orbits allow satellites to pass over the same location at the same local time each day. These orbits are between 700-800 km in altitude.
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This document provides an introduction to satellite communication. It defines what a satellite is, noting that the first Indian communication satellite was Aryabhatta, launched in 1975. Satellites are classified as either active or passive. Active satellites contain transponders that amplify and translate signals to avoid interference. Passive satellites can be natural, like the Moon, or artificial. The document also summarizes Kepler's laws of planetary motion, including his first law that planets orbit in ellipses with the Sun at one focus, his second law about equal areas being swept in equal times, and his third law relating orbital periods to semi-major axes.
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hiee guyes this is swapnil thaware here i uploaded slide for your knowledge if you want more detail msg me on fb or mail i will help you
thanking you and slideshare.com
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1. Equatorial orbits include circular orbits directly above the equator, including geostationary orbits where satellites orbit at the same rate as the Earth's rotation.
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A geostationary satellite orbits directly over the equator at an altitude of about 35,800 km, matching the Earth's rotational period of 24 hours. This allows the satellite to appear stationary from Earth. Three geostationary satellites provide global coverage except for polar regions. While offering constant coverage, geostationary satellites have higher latency than low Earth orbit satellites due to their greater distance.
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This document provides an introduction to satellite communication. It defines what a satellite is, noting that the first Indian communication satellite was Aryabhatta, launched in 1975. Satellites are classified as either active or passive. Active satellites contain transponders that amplify and translate signals to avoid interference. Passive satellites can be natural, like the Moon, or artificial. The document also summarizes Kepler's laws of planetary motion, including his first law that planets orbit in ellipses with the Sun at one focus, his second law about equal areas being swept in equal times, and his third law relating orbital periods to semi-major axes.
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Satellite communication, in telecommunications, the use of artificial satellites to provide communication links between various points on Earth. Satellite communications play a vital role in the global telecommunications system. Approximately 2,000 artificial satellites orbiting Earth relay analog and digital signals carrying voice, video, and data to and from one or many locations worldwide.
Satellite communication has two main components: the ground segment, which consists of fixed or mobile transmission, reception, and ancillary equipment, and the space segment, which primarily is the satellite itself. A typical satellite link involves the transmission or up linking of a signal from an Earth station to a satellite. The satellite then receives and amplifies the signal and retransmits it back to Earth, where it is received and reamplified by Earth stations and terminals. Satellite receivers on the ground include direct-to-home (DTH) satellite equipment, mobile reception equipment in aircraft, satellite telephones, and handheld devices.
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hiee guyes this is swapnil thaware here i uploaded slide for your knowledge if you want more detail msg me on fb or mail i will help you
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Satellite communications systems involve satellites orbiting Earth that relay signals between ground stations. The document discusses several key topics:
1. The types of satellites include communication, weather, navigation, military and scientific satellites. Different orbits are used including geostationary and polar orbits.
2. Satellite subsystems include power, communication, antenna and control subsystems. Earth stations have antenna, transmit, receive and power subsystems.
3. Satellites can route signals via transponders and techniques like frequency reuse increase channel capacity. Handovers allow signals to transfer between satellites or ground stations.
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There are several types of satellite orbits that are used for different applications:
1. Equatorial orbits include circular orbits directly above the equator, including geostationary orbits where satellites orbit at the same rate as the Earth's rotation.
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3. Inclined orbits follow paths other than directly over the equator or poles and are used by some countries for domestic communication networks.
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This document provides an overview of satellite communications. It defines a satellite as a smaller object that revolves around a larger object in space. Satellite communication involves transmitting electromagnetic waves between ground stations and satellites to carry information such as voice, audio, video or data. The document describes how satellites work, the different types of satellites including passive and active satellites, and the key elements and services of satellite communication systems. It also discusses the various orbits that satellites can operate in, as well as applications and advantages/disadvantages of satellite communication.
Vaibhav
Satellites are self-contained communication systems that receive and retransmit signals from Earth using a transponder. They must withstand launch stresses and operate reliably in space for up to 20 years. Key components include antennas, solar panels, batteries, and thrusters. Satellites operate in different orbits - low, medium, and geosynchronous - and use radio frequencies from 1-50 GHz to transmit signals. The International Telecommunication Union regulates satellite communications globally.
Comsat
This document provides information about satellite communication. It begins by defining what a satellite is and notes that the first artificial satellite was Sputnik 1 launched by the Soviet Union in 1957. It then discusses how communications satellites work by transmitting signals between an earth station and the satellite. The main components of satellite communication systems are the satellite and the ground station. There are three main types of orbits for satellites: low Earth orbit, medium Earth orbit, and geostationary Earth orbit. The document concludes by discussing some advantages and disadvantages of satellite communication.
Artifitial satellite
The document provides an overview of artificial satellites, including their history, types, components, and importance. It discusses key events like the launch of Sputnik 1 (the first artificial satellite) and describes different types of satellites such as scientific research satellites, weather satellites, communications satellites, navigation satellites, Earth observation satellites, and more. It also provides lists and details about artificial satellites launched by India, including their launch dates and purposes.
Satcom 2
Satellite communications use satellites orbiting Earth to relay radio signals between Earth stations. The first artificial satellite, Sputnik 1, was launched by the Soviet Union in 1957. Early communications satellites like Early Bird in 1965 provided the first commercial satellite services, allowing transatlantic phone calls. There are different types of satellite orbits like low Earth orbit (LEO), geostationary Earth orbit (GEO), and medium Earth orbit (MEO) that influence factors like coverage area and signal delay. Modern satellite systems provide global services for communications, weather monitoring, navigation (GPS), and earth observation.
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Geostationary satellites
- 1. Geostationary Satellites There are 2 kinds of manmade satellites in the heavens above: One kind of satellite ORBITS the earth once or twice a day, and the other kind is called a communications satellite and it is PARKED in a STATIONARY position 22,300 miles (35,900 km) above the equator of the STATIONARY earth. A type of the orbiting satellite includes the space shuttle and the international space station which keep a low earth orbit (LEO) to avoid the deadly Van Allen radiation belts. The most prominent satellites in medium earth orbit (MEO) are the satellites which comprise the GLOBAL POSITIONING SYSTEM or GPS as it is called. The Global Positioning System The global positioning system was developed by the U.S. military and then opened to civilian use. It is used today to track planes, ships, trains, cars or literally anything that moves. Anyone can buy a receiver and track their exact location by using a GPS receiver. GPS satellites orbit at a height of about 12,000 miles (19,300 km) and orbit the earth once every 12 hours. About 24 GPS satellites orbit the earth every 12 hours. These satellites are traveling around the earth at speeds of about 7,000 mph (11,200 kph). GPS satellites are powered by solar energy. They have backup batteries onboard to keep them running in the event of a solar eclipse, when there's no solar power. Small rocket boosters on each satellite keep them flying in the correct path. The satellites have a lifetime of about 10 years until all their fuel runs out. Geostationary or communications satellites are PARKED in space 22,300 miles (35,900 km) above the equator of the STATIONARY earth. Geostationary satellites are used for weather forecasting, satellite TV, satellite radio and most other types of global communications. Communications satellite in a stationary position or slot high above the earth. Satellite dish or receiver installed on a house. These dishes point to a geostationary satellite. At exactly 22,300 miles above the equator, the force of gravity is cancelled by the centrifugal force of the rotating universe. This is the ideal spot to park a stationary satellite. At exactly 22,000 miles (35,900 km) above the equator, the earth's force of gravity is canceled by the centrifugal force of the rotating universe. This is the ideal location to park a stationary satellite. The signal to the satellite is very, very precise and any movement of the satellite would cause a loss of the signal. Sun outages affect a geostationary satellite Geostationary satellites are fantastic means of communication except for one little problem called SUN OUTAGES. These sun outages happen during March and September when the sun passes the equator. Here is a quote from the book Satellite Technology: "The elevated temperature of the sun causes it to transmit a high-level electrical noise signal to receiving systems whenever it passes behind the satellite and comes within the beams of the receiver antennas. The increase in noise is so severe that a signal outage usually results. The length and number of the outages depends on the latitude of the earth station and the diameter of the antenna. At an average latitude of 40° in the continental United States, and a 10-meter antenna, the outages occur over 6 days with a maximum duration of 8 minutes each day. With a less directional 3-meter antenna, the outages occur over 15 days, with a maximum duration of 24 minutes. Stationary satellites need very small motors to keep them in their assigned slot!