Satellite Communication Overview of the Technologies & the Antenna System

Key Issues

Looking ahead of the 1990s, one could observe a very rapid expansion of the global market in satellite communication into personal communication and new mobile satellite services, such as Personal Conversation System (PCS) and Mobile Satellite Services (MSS) respectively, Low Earth Orbit (LEO) satellite systems, Global Positioning System (GPS) navigation, and new direct broadcast satellite services. LEO satellite services were introduced towards the end of the 1990s, and the growth depended on competitive factors. The conventional Fixed Satellite Services (FSS) and Maritime Mobile Satellite Services (MMSS) grew steadily but not as before.

Optical fiber cables, now forming a greater part of this conversation revolution throughout the world, severely challenged the fixed satellite services. Very high data rates, similar to High Dynamic Range (HDR) graphics, which require greater than 155Mb per second of data transfer, which required excellent signal conditioning, were being carried by the fiber optics cables.

Fiber optic cables have a better performance than satellites, having much less time delay in transmission. It was a time when satellite services needed to prove their advantage on HDR applications and networking, having more modest data rates, for example, T1=1.5Mb per second. A T-1 line consists of 24 individual channels, each of which supports up-to 64Kbits per second data rate.

The advantages include wide-area coverage, distance insensitivity, flexibility, multiple access and destination capabilities, and economy. Although much on the HDR traffic, such as multi-channel telephone trunks, from satellites to cables, will be transmitted through fiber optics cables, new opportunities opened up for HDR satellites to carry HDTV picture signal distribution, and also support the emerging field of Distributed High-Performance Computing (DHPC). To gain access to this application market, HDR satellites needed to be developed and deployed commercially.

Satellite Communication Systems

A brief discussion, relating to the assessment of satellite communication … Read the rest

Satellite Communication Components for Communication Satellites

The simple application of any communication satellite, no matter whether it is low earth orbital or geosynchronous, includes the transmission of facts from an originating Earth station towards the satellite concerned, which can be termed as “up-linking,” followed by re-transmission from the same info towards the designated Earth station. This re-transmission is termed “down-linking.” The downlink on the details may be to one particular unique Earth station or broadcasted over a chosen number of Earth stations, situated at a bigger region.

To perform this up-linking and down-linking, the satellite features a receiver and also a acquire antenna, a transmitter, and also a transmit antenna, just like a set of a walkie-talkie, which includes a receiver in addition to a transmitter with an antenna, even though is right here, the “receive” and “transmit” is carried out through the same antenna. Satellites will need antennas separately for their two functions of acquiring and transmit. On top of that, the satellite has electronic switches.

This can be utilized to logically switch the uplink signals, down-linking it towards the suitable Earth stations. It has an electronic black-box to ascertain the destination or destinations from the signals getting down-linked to the Earth Stations. There’s that ever vital electrical energy within a satellite necessary in maintaining alive the electronic circuitry. The exact component structure of a satellite may well differ from one towards the other, based on its actual application, but the standard element requirements remain the same.

The electrical power needed by satellites for receiving and transmitting signals tremendously depends upon its orbital path, that is, irrespective of whether it can be a low Earth or geosynchronous orbital satellite. Electrical power requirements mainly depend upon the height of the satellite above the Earth. The higher it can be, a satellite would want that considerable energy … Read the rest

The Benefits And Drawbacks Of Satellite Net Service

Possibly you live inside a rural location and also you can not get cable or DSL high-speed Internet access, but you can get satellite. Or, perhaps that you are at your wit’s finish with the cable and/or phone (DSL) companies and never desire to give either of them a further dime. The satellite can be the answer, but you will do a bit of study before determining if it’s going to match your desires. Here are answers to lots of the most typical queries with regards to satellite service.

Q: How Rapid Is Satellite Access?

A: Satellite providers usually supply several levels of service with download speeds ranging between 700 Kbps and 1.5 Mbps and upload speeds as higher as 256 Kbps. Note, although, that they are optimal speeds. Typical speeds, especially during peak instances, could be somewhat slower.

Q: How Much Does The Satellite Access Price?

A: The price will depend on your provider and the service strategy which you acquire. As a generalization, prices range from roughly $60 a month for service delivering roughly 700 Kbps download speed to about $80 a month for service inside the 1.5 Mbps range. Also, your gear costs are often as much as $300 or $400 and installation can price a further $200, even though vendors normally have particular gives for gear and installation.

Q: What Effect Can Weather Have On Satellite Access?

A: As would be the case with satellite television, extreme rain or snow can slow or stop Satellite World wide web access. That is true both for the bad climate in your location as well as the undesirable climate in the location in the satellite provider’s network operations center (NOC). Nonetheless, even though serious weather can break the connection, satellite systems typically operate even in robust, steady downpours.

Q:

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Introduction and Short History of Satellites and Communication Satellites

Introduction And Brief History Of Satellites

A satellite is any object that orbits a different object (that is referred to as its primary). All masses that are part of the solar system, like the Earth, are satellites either of the Sun or satellites of these objects, like the Moon. It truly is not constantly a simple matter to decide which can be the ‘satellite’ inside a pair of bodies. For the reason that all objects exert gravity, the motion of the major object can also be impacted by the satellite. If two objects are sufficiently comparable in mass, they are typically referred to as a binary system as an alternative to a principal object and satellite. The general criterion for an object to be a satellite is that the center of mass on the two objects is inside the principal object. In common usage, the term ‘satellite’ commonly refers to an artificial satellite (a man-made object that orbits the Earth or yet another body).

Sorts Of Satellites

  • Astronomical satellites: They are satellites utilized for observation of distant planets, galaxies, and also other outer space objects.
  • Communications satellites: They are artificial satellites stationed in space for telecommunications using radio at microwave frequencies. Most communications satellites use geosynchronous orbits or near-geostationary orbits, though some recent systems use low Earth-orbiting satellites.
  • Earth observation satellites are satellites specifically designed to observe Earth from orbit, comparable to reconnaissance satellites but intended for non-military uses for instance environmental monitoring, meteorology, map producing, and so forth. (See particularly Earth Observing System.)

Orbit Kinds

On lots of occasions, satellites are characterized by their orbit. Though a satellite may orbit at pretty much any height, satellites are usually categorized by their altitude:

  • Low Earth Orbit (LEO: 200 – 1200km above the Earth’s surface)
  • Medium Earth Orbit (ICO or MEO:
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Choosing RV Satellite Dishes: What Option Is Best?

Ah, the great outdoors! Campfires out under the stars, picnic food, long walks along wooded trails, nature in all her glory, watching the NFL Game of The Week or the latest movie releases on your 42in flat screen—wait, something is not right here. Rugged pioneer-style camping is fine and great, but if you’ve committed traveling in a Motorhome, 5th Wheel, or large trailer, you’ve already made the commitment to bring the comfort of home with you, so why not watch what you like to watch?

There are several options to view your favorite shows whilst on the road. Just as at your permanent base, you have the option of viewing local or terrestrial originated signals, or satellite service. For many years RV’s came with a pop-up antenna, or it was an add on option, that would allow you to possibly receive local network-affiliated stations, depending on locale, weather, etc. This is still a great option to keep; even you have or will have a satellite receiver, so you can receive local programming if needed.

However, it is important to remember that since 2010 all licensed broadcast providers are required to send their signals in Digital and older antennas, televisions will not receive that signal unless the proper upgrade box or digital-ready television is hooked into the system. If that is questionable you can always consult your RV parts dealer or a reputable electronics retailer.

The best option for receiving television while on the road is by satellite. Long gone are the days of the 12ft monster dish taking up space in your yard. The small digital dishes that are for home use now are perfect for travel.

There are two types available at the present-portable and roof-mounted. All satellite dishes have the same basic components- a parabolic receiving dish to … Read the rest