Tag: language, writing and great books

B. Roadways

Trails and footpaths long were the only means of communication in the Himalayas. Although those continue to be important, especially in the more remote locations, road transport now has made the Himalayas accessible from both north and south. In Nepal an east-west highway stretches through the Tarai lowlands, connecting roads that penetrate into many of the country’s mountain valleys.

The name of this satellite was intelset. It was niknamed as early bird. It was launched on April 6, 1965. It was built by space and communication group of Hughes aircraft company. It was the first communicational satellite launched in geosynchronous orbit. Hence it is an geostationary satellite.

• Frequency Division Multiple Access (FDMA) is one of the most common analogue multiple access methods. The frequency band is divided into channels of equal bandwidth so that each conversation is carried on a different frequency .
•  Time Division Multiple Access (TDMA)  is a channel access method for shared-medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots.The users transmit in rapid succession, one after the other, each using its own time slot.
• Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel.

• A single geostationary satellite is on a line of sight with about 40 percent of the earth's surface. 
  
• Three such satellites, each separated by 120 degrees of longitude, can provide coverage of the entire plane the north and south geographic poles.