Because of economics. On the ground you an afford to use a big transmitter and a big antenna, while on the satellite both have to be smaller. Therefore most of the power and the gain happens at the ground station.
Communication - Power Station song - was created on 1985-10-28.
how to work HPA
wastage of power
The Traveling Wave Tube Amplifier (TWTA) is widely used as a power amplifier in satellite communication systems. It amplifies signals in the microwave frequency range and is capable of providing high power output with low noise and distortion. TWTA technology has been utilized for several decades in satellite communication due to its reliable performance and efficiency.
A satellite docking station is a place where you can power up all of your electronic devices, such as your phone, PDA, iPod, camera, etc. This will ensure that these items will last so that you may use them for long periods of time.
Satellites are usually fitted with a re-chargeable battery, and solar panels. The solar panels absorb energy from the sun, and the batteries store the energy for use by the satellite.
A type of communication level in which one converses/communicates with spirits or someone of a higher power; GOD. (A divine)
In satellite communications, the uplink frequency is of a higher value than the downlink mainly because of two reasons: 1. to mitigate the free space spreading losses, and the tropospheric losses (gases, clouds, rain), all of which are related to wavelength and therefore to frequency (wavelength=speed of light in vacuum/frequency). In a point to point scenario (fixed wireless links) this becomes irrelevant as the difference between the forward channel and the return channel is not very large. In this case, the assignment is a consequence of the coordination studies carried on in the framework of the ITU to minimize the impact one microwave service might have upon another (satellite on fixed terrestrial, WiMax on fixed satellite, fixed terrestrial on satellite, mobile telephony on satellite, etc). 2. Besides this transmission aspect, there is always the intra-system interference issue, which is the interference caused in your signals by other signals transmitted by your own system. in this case, to avoid interference from site A to Site B and viceversa, a frequency channel is assigned to Site A's transmissions and another to Site B's. in this case one of them is higher in frequency than the other. I hope i am not confusing you more with this answer. In a nutshell, a) one reason is interference, to avoid colliding as two cars might do if they travel in opposite sense on a highway b) another is related to propagation of the signals, and to help the site which is more complicated to design and has more compromises of power/transmission power/heat etc (the satellite). Regards,
Satellites don't provide power for space shuttles. The shuttle could receive power from the international space station, but besides that, the shuttle wouldn't take any power from any satellites.
Battersea power station. Hartlepool power station
There are three power stations in India; Tarapur Atomic Power Station, Rajastan Atomic Power Station and Kakrapar Atomic Power Station.
Cruachan Power Station is a storage hydro-electric power station whereas a Normal Hydroelectric power station is produced and then used, no storage needed.