GPS satellites send signal information, such as time, position of satellite, position of receiver, and traffic condition on the earth.
举一反三
- 6. GPS determines location by computing the difference between the time a signal is sent and the time is received. GPS satellites carry ______ that provide extremely accurate time. The time information is placed in the codes broadcast by the satellite so that a receiver can continuously determine the time the signal was broadcast.
- A GPS receiver, or GPS sensor, is able to determine its position and velocity ______ the earth’s surface by calculating the amount of time it takes for signals from different GPS satellites to reach the receiver. A: on top of B: next to C: in spite of D: relative to
- Geostationary satellites are the man-made satellites which . A: are always fixed in the regular position B: sometimes move with the earth C: are synchronizing with the movement of the earth D: can not fly off from the ground
- ()service means a service which is based on polar orbiting satellites which receive and relay distressalerts from satellite EPIRBs and which provides their position . A: Geostationary satellite B: Near-polar orbiting satellite C: synchomizing satellite D. D: Terrestrial satellite
- How many satellites are required to compute a GPS position at least? A: 3 B: 4 C: 5 D: 6