gps考试复习题（GPS exam review questions）.docVIP

gps考试复习题（GPS exam review questions） 1, relative positioning, the smaller the distance between two points, the greater the impact of ephemeris errors. A correct B error 2, relative positioning can eliminate the influence of satellite clock difference. A correct B error 3, double frequency observation can eliminate the ionospheric refraction error. A correct B error 4, the size of board can avoid anti multipath error effect. A correct B error 5. The effect of ionospheric refraction is greater during the daytime than at night. A correct B error 6, test site should avoid reflection, lest multipath error influence. A correct B error 7. The receiver does not have a telescope, so there is no observation error. A correct B error 8, the bigger the precision attenuation factor is, the smaller the position error is. A correct B error 9, the precision attenuation factor is a function of the principal diagonal element of the weighting coefficient matrix. A correct B error 10 and 97 procedures specify that PDOP shall be less than 6. A correct B error 11, strong electromagnetic interference will cause cycle slips. A correct B error 12 、 double difference can eliminate the influence of receiver clock difference. A correct B error 13. The main difference between differential positioning and relative positioning is data chain. A correct B error 14 and RTD is real-time pseudo range difference. A correct B error 15 and RTK is real-time pseudo range difference. A correct B error 16, real-time carrier phase difference referred to as RTK. A correct B error The accuracy of 17 and RTD is higher than RTK. A correct B error The accuracy of the 18 and GPS networks is divided by the base length error. A correct B error 19, 97 procedures stipulated in the GPS network accuracy class has 5, the highest accuracy level is two. A correct B error 20. The known points in the GPS network should be no less than three. A correct B error 21. Scale reference can be measured by range finder. A correct B erro