Lecture 2 quiz1.Which of the following navigation systems has disadvantages when compared with GPS?a.Dead rechoningb.Celestialc.OMEGAd.LORANe.Local landmarksf.All have disadvantages2.GPS was originally developed by the ____ at a cost of $12 billion so that _____ could establish their launch position. 3.Select the best definition of GPS from these:4.What type of signal is sent from the GPS satellite?5.The GPS system consists of at least 24 ____ plus controlling _____. 6.Satellites are arranged so that a minimum of ____ satellites are in view from everywhere on earth. 7.Knowing your distance from three satellites will narrow your position to ____ possibilities in space. 8.Velocity x time = 9.A signal sent from a satellite in the GPS system is travelling at the speed of______.10.The distance to the satellite overhead is calculated by figuring out how long it takes for a signal sent from the satellite to reach our GPS receiver. This signal is sent out as a __________ code.11.When the code coming from the satellite is compared to the code from our receiver (both issuedat the same exact time), the difference can be used to calculate ____ between satellite and receiver. 12.Why is the signal from the GPS satellites so complex?
13.What kind of clocks are used on satellites to ensure perfect timing?14.GPS receivers are synchronized to _____ time and are therefore the most widely available sourceof precise time. 15.Using a fourth satellite measurement allows a GPS receiver to find a single correction factor for timing measurements and narrows the geographic position down to one point location.16.It is necessary only to closely approximate the known positions of the GPS satellites in space.17.All GPS receivers have an almanac programmed into their memory to tell them ____.