MAC Protocols
One of the key design issues in satellite communication is how to efficiently allocate transponder channels. Uplink channel is shared by all the ground stations in the footprint of a…
VSAT Systems
VSAT stands for Very Small Aperture Terminal. It was developed to make access to the satellite more affordable and without any intermediate distribution hierarchy. Most VSAT systems operate in Ku…
WHY IS A SHIP CALLED SHE?
A ship is called a ‘she’ because there is always a great deal of bustle around her; There is usually a gang of men about, She has a waist and…
GEO Satellites
Back in 1945, the famous science fiction writer Arthur C. Clarke suggested that a radio relay satellite in an equatorial orbit with a period of 24 h would remain stationary…
Medium Earth Orbit Satellites
MEO satellites are positioned between two Van Allen Belts at a height of about 10,000 Km with a rotation period of 6 hours. One important example of the MEO satellites…
Why work at sea?
1. To see the world Some people choose to work at sea because it gives them a chance to travel or because they like the way they can get responsible jobs…
Satellite Networks
Introduction Microwave frequencies, which travel in straight lines, are commonly used for wideband communication. The curvature of the earth results in obstruction of the signal between two earth stations and…
People on the ship and what do they do ?
Below is a brief description of various positions on a typical - larger vessel. This is given as an overall view there may be more or less people depending on…
Bluetooth Architecture
The Bluetooth architecture, showing all the major layers in the Bluetooth system, are depicted in the Fig. The layers below can be considered to be different hurdles in an obstacle…
MV Solitaire”of All Seas is the largest pipelay vessel in the world.
Some interesting features of MV Solitaire are: Here is a photograph of MV Solitaire, from All Seas. ● has a pipe carrying capacity of 22000 t. ● maneuvers with full dynamic positioning to…
