Very Small Aperture Terminal or VSAT technology is basically a two way satellite groud station that facilitates satellite communications of voice signals, data signals and video signals and connections. With VSAT, narrowband, broadband and on-the-move trackings like corporate bodies, banking sector, hospitals, stock exchanges, educational institutions, government, defence, airlines, mining corporations, power projects and more become smoother.
How does VSAT work?
It consists of two parts, a transceiver and an indoor device. A VSAT user requires a box to read between the user’s computer and an outdoor antenna which has a transceiver. The transceiver is used to send and receive signal to and from a satellite transponder via an earth based station known as ‘hub’ which is interconnected with the satellite.For communication every transmission goes to the hub station first that retransmits the signals via the satellite reaching the end user’s VSAT.
Advantages of VSAT
VSAT technology has its own benefits. VSAT requires low transmission power, it is light in weight and economically affordable. The construction cycle involves 2 simple steps; installation of the necessary devices at both ends of communications and then proper assembly of the equipment. Longer the distance, better the VSAT communication. Also , VSAT communications remain unaffected by climate or location but can be slightly interrupted by the ground. This flexible technology is easy to maintain and expand.
Limitations of VSAT communications
The disadvantages of VSAT communications are lesser than the advantages. A clear line of sight should be maintained between VSAT dish and space satellite. Incase of star topology, satellite malfunctioning could irritate VSAT services so reduntant systems and switch over units could be used as backups for switching in intense situations. Weather conditions may disrupt signals temporarily. VSAT signals are prone to hacking chances since they are transmitted through air. Over all VSAT communication cost may increase encryption-decryption units.
The future of VSAT
Multiservice is the future of VSAT technology. catering to the bandwidth demand and and economy scale will be major areas of focus. Also, with High Throughput Satellites (HTS), satellite operators will start offering managed services (in Mbps) across multiple spot beams and vertical markets.