Analysis of Control Measurement Data of Different Geodetic GNSS Receivers in Canyon Area
In the survey and design stage of a reservoir,the fourth-class GNSS three-dimensional control network(refined elevation)is adopted.In view of the deep mountain ditch and steep terrain in the survey area,it belongs to the typical"V"-type alpine canyon terrain.The number of visible satellites is small,and the elevation angle is greater than 30°.Eight sets of Huace i90 receivers and eight sets of Huace P5(supporting HXCCGX601 A choke ring antenna)receivers are used in the control network measurement.The observation data,baseline accuracy,synchronization loop closure error and adjustment accuracy of the two receivers are compared and analyzed.The data comparison results show that.The observation effect of the split GNSS receiver with choke coil antenna is better than that of the integrated GNSS receiver with the same nominal accuracy under the condition of high mountains and canyons.It is suggested that the split GNSS receiver with choke coil antenna should be selected as far as possible under similar unfavorable observation conditions.
万方数据
维普
