How many GPS satellites are needed to cover the world?
four satellites
How many GPS satellites were there when the system was originally set up?
24 satellites
How many signals do GPS satellites transmit?
Each GPS satellite transmits data on two frequencies, L1 (1575.42 Mhz) and L2 (1227.60 MHz). The atomic clocks aboard the satellite produces the fundamental L-band frequency, 10.23 Mhz.
What is the approximate time taken by the GPS for one complete orbit?
What is the approximate time taken by the GPS for one complete orbit? Explanation: The GPS satellites are in approximately 12 hour orbits( 11 hours, 57 minutes, 57.27 seconds) at an altitude of approximately 11,000 nmi.
Which process is adopted in case of navigation system?
Which of the following process is adopted in case of navigation system? Explanation: Pseudo ranging can be adopted in case of navigation because it contains reference systems, which must be defined and maintained without direct access to the origin.
Which of the following is the most fundamental for satellite navigation?
1. Which of the following is the most fundamental for satellite navigation? Explanation: All of the satellite navigation equations have either satellite position or velocity as a variable.
Is considered as the unsolved problem in satellite system?
Is a loss of power of a satellite downlink signal due to earth’s atmosphere.
Why is there a huge spectrum space between the transmitted and received?
Why is there a huge spectrum space between the transmitted and received signal in satellite communication? Explanation: Because of the close proximity of the transmitter and the receiver in the satellite, the high transmitter output power for the downlink is picked up by that satellite receiver.
What is the reason for carrying multiple transponders in a satellite?
4. What is the reason for carrying multiple transponders in a satellite? Explanation: To be economically feasible, a satellite must be capable of handling several channels. As a result, most satellites contain multiple transponders, each operating at a different frequency.
Is a measure of the fraction of frame time which is used for the transmission of traffic?
14. Define frame efficiency. It is measure of the fraction of frame time used for the transmission of traffic. 15.