With a kind permission from our nice supervisors:We are hiring satellites engineers!!

الكاتب : SkyLighter   المشاهدات : 446   الردود : 4    ‏2004-04-29
      مشاركة رقم : 1    ‏2004-04-29
  1. SkyLighter

    SkyLighter عضو متميّز

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    yes,you heard me already,so get yourself togather,stop dreaming and start a real living:

    Satellites r Us :Yemenat Satcom is looking for few bright,exeptional and motivated people to work in satellite engineering and marketing,let's see what you know about satellites???

    I will answer this one only,and you answer the next question to get contacted;What is a Satellite?
    A satellite is a specialized wireless receiver/transmitter - essentially a radio-frequency repeater - that is launched by a rocket and placed in orbit around the earth. Today, there are literally hundreds of commercial satellites in operation around the world. These satellites are used for such diverse purposes as wide-area network communication, weather forecasting, television broadcasting, amateur radio communications, Internet access and the Global Positioning System.

    The first man-made satellite, which was about the size of a basketball, was launched by the Soviet Union in the late 1950s. It did nothing but repeatedly transmit a simple Morse code signal back to earth. Since that time, satellites have become much more powerful.

    Most communication satellites in use today are geostationary. They orbit the earth directly over the equator, approximately 22 000 miles (35 400 km) up. At this altitude, one complete trip around the earth (relative to the sun) takes 24 hours. Thus, the satellite remains over the same spot on the surface of the earth (geo) at all times, and stays fixed in the sky (stationary) from any point on the surface from which it can be "seen." A single geostationary satellite can "see" approximately 40 percent of the earth's surface. Three such satellites, spaced at equal intervals (120 angular degrees apart), can provide coverage of the entire civilized world.

    A single transponder on one of these satellites (the part of the satellite that transmits signals back to Earth, of which a typical satellite has 32) is capable of handling approximately 100 million bits of information per second. This means that if the transponder is accessed for only 90 seconds per day, close to a billion bytes of data would be transferred - the equivalent of 865 000 double-spaced pages. With this immense capacity, today's communication satellites are an ideal medium for transmitting and receiving almost any kind of content, from simple data to the most complex and bandwidth-intensive video, audio and data content.

    Now answer this question: what is Vsat???
     
  2.   مشاركة رقم : 2    ‏2004-04-29
  3. ra7alboy

    ra7alboy عضو متميّز

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    What is a VSAT?

    What is a VSAT?

    A very small aperture terminal (VSAT) is a device - known as an earth station - that is used to receive satellite transmissions. The "very small" component of the VSAT acronym refers to the size of the VSAT dish antenna -typically about 2 to 4 feet (0.55-1.2 m) in diameter- that is mounted on a roof on a wall, or placed on the ground. This antenna, along with the attached low-noise blocker or LNB (which receives satellite signals) and the transmitter (which sends signals) make up the VSAT outdoor unit (ODU), one of the two components of a VSAT earth station.


    The second component of VSAT earth station is the indoor unit (IDU). The indoor unit is a small desktop box or PC that contains receiver and transmitter boards and an interface to communicate with the user's existing in-house equipment - LANs, servers, PCs, TVs, kiosks, etc. The indoor unit is connected to the outdoor unit with a pair of cables.



    Advantages of VSAT technology

    As companies compete for an increasingly savvy customer looking for value (quality and service), information technology and communications networks are becoming tools to achieve business goals. Today's networks must support the need to improve customer service, increase per site revenues and reduce costs (all driving net income growth) - in the most cost-effective manner possible. Further, network managers want virtual 100% availability. They need to easily expand the network when they acquire, move or add new sites to the operations. In addition, they require network flexibility - ease of migration from existing legacy systems as well as addition of new network applications as their companies offer additional services to its customers

    Businesses and organizations give many reasons for using VSAT networks over terrestrial alternatives. Among them are:

    Cost-effective
    Flexibility
    Accessibility
    Availability
    Reliability
    Versatility
    Transmission quality
    High network performance
    Fast transmissions
    Control
    Ability to handle large amounts of data
    Single vendor solution for both equipment and bandwidth
    Broadcast capability
    Ability to handle Voice, Video and Data
     
  4.   مشاركة رقم : 3    ‏2004-04-30
  5. ابن نفل

    ابن نفل قلم فضي

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    This is just to enhance ra7alboy

    with your permission ra7alboy this is just to enhance ur respond

    VSAT >>Very Small Aperture Terminals

    Software-driven earth station<<typically 0.9-2.4 meters, which equates to 3-8 feet, though larger units are used for the reliable transmission of data, video, or voice via satellite. It requires no staff or additional technology to operate it. It simply plugs into existing terminal equipment

    Reliable Communications
    VSAT satellite communications provide virtually error-free digital data communications and better than 99.9% network reliability

    Remote Communications
    No matter how remote or dispersed your operations are, VSATs provide a link to your headquarters. VSAT can provide remote diagnostics, remote monitoring, and data ********* services from remote or hazardous sites

    System Integration
    Turnkey seamless integration of communications requirements provide a one point contact for your private data network From design, implementation, installation and management a turnkey solution to your communications requirements. These services are provided in an individualized cost-effective solution

    Mobile VSAT Communications System
    Data and Voice Connectivity
    Fax
    Video
    Installation, Moving And Set-up Services
    Broadcast Services
    Contract Installation and Service on VSAT Networks
    Real-Time Data Acquisition and Broadcast
    7/24 Hour Service and Support
    Lease-Line, Backhaul Support
    CDMS (Code Division Multiple Access) Technology
    SCPC (Single Carrier Per Channel) Technology
    TDMA (Time-Division Multiple Access) Technology
    Multiple Network Configurations
    VSAT services are delivered through the use of either C-Band or KU-Band geostationary satellites for video, voice, fax and data transmissions. VSATs use a star network with the use of satellite earth stations that rely on a large central hub. Alternatively the use of mesh (hubless) VSAT networks can provide communication between VSAT terminals directly. They can be configured in both one-way (receive only) and two-way (interactive) VSAT terminals. Most VSAT terminals utilize satellite dishes in the 1 to 2.4 meter range, though both smaller and larger dish configurations are available. The selection of satellite, terminal size and configuration is based on the specific requirements of the applications for which VSAT will be utilized. H.M.S. Communications, Inc. can provide the specific solution to your specific communication needs, through our large array of products, services and provider network. Contact H.M.S. Communications to learn more.

    VSAT is growth compatible, VSAT allows the user to make incremental increases in its network. The use of VSAT provides the ability to expand capacity and system growth, while maintaining a handle on costs which are closely associated with the increase in capacity or system growth. The VSAT network is highly manageable, and allows many options in planning the network with regards to bandwidth, services and protocols. VSAT can provide a seamless means of integrating your Wide Area Network (WAN) across the country, or across the world.

    H.M.S. Communications, Inc. can provide VSAT solutions globally utilizing a wide selection of satellites, networks, earth stations and connections to insure that the specific requirement is meet with the best possible solution, utilizing some of the world's leading VSAT satellite operators and earth stations. Our network of equipment and service providers enables us to provide a custom solution anywhere, at a competitive price and with reliable delivery, installation and setup. H.M.S. Communications, Inc. is selective in its partners, partnering with those firms that have the same commitment to quality service, reliability and value in providing the communication solution that meets the needs of our clients, on a global basis.

    >>>>>>>>>>>>>>
    The above datas on VSAT are from:-1

    H.M.S. Communications, Inc
    Google
     
  6.   مشاركة رقم : 4    ‏2004-04-30
  7. ra7alboy

    ra7alboy عضو متميّز

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    With My Pleasure ابن نفل
     
  8.   مشاركة رقم : 5    ‏2004-05-06
  9. SkyLighter

    SkyLighter عضو متميّز

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