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A NEW METHOD FOR PREDICTING TROPOSPHERIC RANGE ERROR 总被引:1,自引:0,他引:1
Based on the quasi-measured values of tropospheric refraction,the relation betweenand △R as expressed in Eq.(3)is proved,and according to the stable feature of refractivityat 9 km above sea level,a simplified method for predicting tropospheric range error is analysed.Some new parameters for linear regression analysis of tropospheric range error are given also. 相似文献
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一种数字式自动增益控制系统的统计分析 总被引:1,自引:0,他引:1
本文介绍了一种数字式相关接收机自动增益控制系统,文中分析了环路的性能,并推导了决定灵敏度和其它性能指标的公式,还给出了一些例子的静态和动态特性,本文还讨论了设计这类自动增益控制系统的主要步骤。 相似文献
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Based on the observations of a meter-wave aperture synthesis radio telescope,as the scale length of ionospheric irregularity is greatly larger than the baseline length of interferometer,the phase error induced by the output signal of interferometer due to ionosphere is proportional to the baseline length and accordingly the expressions for extracting the information about ionosphere are derived.By using the ray theory and considering that the antenna is always tracking to the radio source in astronomical observation,the wave motion expression of traveling ionospheric disturbance observed in the total electron content is also derived,which is consistent with that obtained from the conception of thin-phase screen;then the Doppler velocity due to antenna tracking is introduced.Finally the inversion analysis for the horizontal phase velocity of TID from observed data is given. 相似文献
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In this paper,an auto-gain-control(AGC)loop which operates in a digital correlating receiveris described.The properties of the loop is analyzed mathematically and the formulas to determinethe sensibility and other parameters are derived.The static and dynamic features of some examplesare shown.The procedure for designing such a gain control loop is discussed. 相似文献
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