3s技术及其应用进展章节测试课后答案2024春

第七章测试

1.Which is NOT one of the components of GPS ? ( )
A:User component B:Control component C:Space component D:Mechanic component
答案:D
2.At least ( ) satellites are required to calculate the distance from the satellite to the receiver.
A:Three B:Five C:Six D:Four 3.The natural errors that cause GPS errors include ( )。
A:receiver noise B:multipath C:tropospheric refraction D:ionospheric refraction 4.( ) are the three basic codes in GPS.
A:C/A code B:Navigation code C:P(Y)-code D:Normal code 5.GPS is a dual-use system and carries two services, including ( )。
A:Precise positioning service B:Open service C:Authorized service D:Standard position service 6.The space segment of GPS consists nominally of 24 satellites operating in six orbital planes spaced at 60° intervals around the equator. （ ）
A:错 B:对 7.For differential GPS(DGPS), base is on unknown point and rover is on known point. （ ）
A:错 B:对 8.The first BeiDou system (Beidou-1) consists of 35 satellites, including 5 geosynchronous satellites and 30 earth orbiting satellites. （ ）
A:对 B:错 9.Because of the clock biases and other sources of error, the observed range from the satellite to receiver is not the true range, and thus it is called a pseudorange. （ ）
A:错 B:对 10.GPS, GLONASS, Galileo and compass (or Beidou) are four global navigation satellite systems in the world nowadays. ( )
A:错 B:对