Home Products GMDSS VSAT NDB – Non-Directional Beacon TVRO and Digital Entertainment Systems Services News Contact Us About Us VSAT Home VSAT Maritime VSAT What is VSAT? VSAT is short for Very Small Aperture Terminal, which refers to the very small opening angle of less than one degree in which the terminal has to tranmit and receive its signals. A VSAT terminal transmits and receives data via satellite. Gyro stabilized satellite antennas are used for moving units like vessels and floating offshore installations. How does VSAT work? VSAT is a two-way communication system where the satellites is positioned in a geostationary circular orbit, about 36,000 kilometres above the Earth’s equator, and follows the Earth’s rotation. This means that a satellites position is fixed in relation to the Earth. A satellite has several transponders which are pointed to a specific region or area of the earth, called footprints. This is also referred to as spot technology. By focussing the power of the satellite signal to these predefined areas, the signal becomes stronger and enables ground terminals to communicate using smaller antennas. The coverage area of a spot-based system is made up of several small circulare areas. Contact Us Today VSAT provides an always-online data and telephone solution. For a fixed monthly price, the customer is in control of their communication costs. Satco Communication delivers proven, cost-effective, reliable VSAT solutions for all kind of businesses worldwide. Whether a VSAT connection is needed for contacting remote locations without other reliable internet connections, or onboard moving units such as ships or floating offshore installations, Satco Communication can design and deliver what's needed. Contact Us Today Each transponder has the capacity of 72 MHz which is around 72 Mbit/s. Land earth stations (LES) act as an active relay creating a transparent layer between on-shore systems and the VSAT customer, enabling the full flexibility of routing phone calls and TCP/IP links to meet the needs of the company and fleet organization. By implemanting VSAT customers will get an always online solution via satellite for a fix price per month or region, and can forget about the more expensive rates of Inmarsat. C band or Ku Band? The Ku (Kurz-Under) band is a part of the electromagnetic spectrum within the microwave frequencies, and ranges from appriximately 10 – 18 GHz. It is primarily used for satellite communications, in majority for fixed and brocast services. Ku band permits the use of smaller antennas that are an aesthetic improvement over more expensive C-band antennas. A typical Ku-band antenna is 60 – 120cm in diameter, while a typical C-band antenna has a diameter of 2.4m. In addition, Ku-band requires less power than C-band in order to provide the same signal strength, allowing the reduction in antennae diameter. C-band antennas have a larger footprint then KU band and are large and costly to install. We believe that Ku-band will be the standard in near future as a consequence of more powerful satellites and reduction in antenna size. Please check the table below for the characteristics of Ku band and others: Band Frequency GHz Area footprint Delivered power Rainfall effect Antenna dish on board C 3 to 7 Large Low Minimum 2,4 meters Dome: 4 meters Ku 10 to 18 Medium Medium Moderate 60 to 120 cm Dome: 130 cm Ka 19 to 40 Small High High 40 – 60 cm SCPC, I-direct or Dynamic SCPC? SCPC (Single Carrier Per Channel) provides the best quality of service. The customer has their own dedicated space on the satellite which is not shared by others. Of the three services, SCPC is the most expensive. I-direct, in contrast to SCPC, is a shared system. The same bandwidth is sold to multiple customers, resulting in the cost to the individual customer decreasing with more users. Less bandwidth is guaranteed, therefore connection ratios (the number of users sharing the same bandwidth) become important. Dynamic SCPC is a combination of shared systems such as I-direct and SCPC. A dedicated bandwidth can be shared within installations in the customer’s company, and important packages like voice and video are given reserved space in the bandwidth to circumvent delay. This solution provides the customer with the best compromise between quality and price. Other shared systems such as DVB and Gilat are price competitive, but at the cost to the customer of reduced bandwidth and convenience. Inexpensive Telephone Calls All of your phone calls can be made using online technology and Voice over Internet Protocol (VoIP) through your VSAT solution. Enjoy clear high quality voice calls all over the world through low-cost satellite technology. Contact Satco Communication for a complete pricelist. VSAT News and Articles: Signed contract for VSAT hire, Iridium and Tecdis on MV Grinna Contract signed for delivery of TVRO and distribution network KU-Band VSAT to Artus Ku band and C band Elvegata 15 NO-4306 Sandnes Norway Phone: +47 97984000 Fax: +47 51622426 Email: satco@satco.no Web: http://satco.no Recent News and Articles Signed contract for VSAT hire, Iridium and Tecdis on MV Grinna Delivered Tecdis on MV Kristin Contract with Astilleros Gondan for Dual TVRO system Contract with HavYard for TVRO Antenna TVRO Installations on Møkster Ships Furuno FAR2117 X-Band radar to MV Kine Triax TDX system on Rem Vision Categories GMDSS NDB News TVRO VSAT Copyright 2013-2014 Satco Communication | All Rights Reserved