the speed of light = 299792458 m / s
GEO (Geostationary Earth Orbit) = 35863000 m above the Earth's surface
they are using the maps at that time
GPS satellites provide location and time information in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS satellites.
http://library.thinkquest.org/03oct/02144/basics/satcomm.htm Satellite Communication Satellites have now become an integral part of the worldwide communication systems. Although long-range and long distance communication took place much before the introduction of satellite systems, they had a lot of disadvantages. Point - to - point communication systems are very difficult in the case of remote & isolated locations, which are surrounded by oceans, mountains and other obstacles created by nature. The satellite is nothing more than a radio-relay station But, they have one potential advantage- The capability of a direct line of sight path to 98% (excluding the polar caps, which are in accessible to satellites) of the earth's surface. One of the most important event in the history of satellite communication took place when COMSAT or communication satellite corporation, launched four satellites within 6 years that is between 1965 to 1979. The first of these series was the 'Early Bird' , which was launched in 1965. This was the first communication station to handle worldwide commercial telephone traffic from a fixed position in space. The next series INTELSAT was a group of satellites that served 150 stations in 80 countries. ..................................... get the points and write the essay urself
all the right equipment and have signal and have a good time
That depends on what you call a satellite. The correct use of the word simply means an object caught in earths orbit. If this is what you are looking for there are litterally tens of thousands of objects from small meteorites to lost tools and rocket stages floating in orbit. So much so that it is now becomming increasingly dangerous to put new vehicles in space as the debris orbits at around 17000 miles per hour. If man made satellites for communications is what you are searching for then thats difficult to gauge. It's unlikely that most countries will admit to placing spy satellites in space to the true figure is difficult to say, but The Goddard Space Flight Center's lists 2,271 satellites currently in orbit. Russia has the most satellites currently in orbit, with 1,324 satellites, followed by the U.S. with 658.
A Greyhound round-trip means you are paying for the return trip in advance. Some round-trip tickets are open-ended (with no designated return date) or have a set date (and time) for returning to the departure location.
A GPS receiver gets its signal from a network of satellites orbiting the Earth. These satellites continuously transmit signals that the GPS receiver uses to calculate its position and determine accurate time information. By receiving signals from multiple satellites, the GPS receiver can triangulate its position with high precision.
Add the time it takes to get there to the time it takes to come back.
Triangulation to known orbital positions of satellites by measuring signal time delays.
Navigation. The Global Positioning System (GPS) provides location and time information for anywhere on the Earth via a series of satellites in geostationary orbits. The time it takes for the driver/pilot to send a signal to the satellites and receive it back again can be used to work out how far away you are from the satellites, which is used to work out where you are.
A communications satellite operates as a transceiver (TRANSmitter - reCEIVER). Signals from a base station on Earth are sent to a satellite receiver. The data is either stored for a period of time or sent immediately to a transmitter on the same satellite. The transmitters on satellites are positioned to transmit towards Earth or towards other satellites. A base station on Earth will receive the transmitted signals and pass them to land based equipment. As satellite signals rely on line of sight, they each have a range over which they can send signals. Too far round the Earth and the signal won't make it. That's why they can also transmit to other satellites before the signal is finally returned to Earth, far round the globe. The data carried by communication satellites is used for a wide variety of applications. Television, telephones, computer networks and far more are regularly sent to and from satellites.
TFTP can transfer a maximum of 512 bytes per client server round trip with its stop and wait protocol. Maximum throughput of TFTP = 512 bytes/ round trip time(client-server) We assume for the Ethernet, the Round trip time = 3 ms The maximum throughput is around 170,000 bytes/sec
The historical flight price for a round-trip ticket from New York to London has varied over time, but on average it has been around 800 to 1200.
A round trip flight is a flight service type in the booking system where one uses a flight service on one route and then returns to the starting point. It encompasses the getting there part of your trip, the going home portion of the trip. Also, a round trip is cheaper than buying two one-way tickets even though both are really just transportation means. Welcome to FlightTrotters, we offer services for searching cheap flights and the best cheap flight deals for round trip travel so you can be sure we always save your time and money. Whether you are in town for a business trip, vacation or to visit your loved ones our team of professionals will assist in availably of the best and most cheap round trip fares. Don’t miss our fantastic offers on round trip flights and get ready for your next adventure without spending much money!
a round-trip ticket at a reduced price. Often for use within a limited period of time.
Birmingham New Street - Northampton (standard class): £13.40 (off-peak one-way) £14.10 (any time one-way) £13.50 (off-peak round trip, return same day) £17.00 (off-peak round trip, return within 1 month) £19.10 (any time round trip, return within 1 month) off-peak = after 09.00 on weekdays, any time at weekends
A Global Positioning System device receives signals sent by GPS satellites high above the Earth and calculates its position on Earth by timing the signals received. The satellites send out information which contains the time the signal was transmitted and the position the satellite was relative to Earth at the time of transmission.