CAJ | 학술논문

K频段微波测距（KBR）系统是低-低卫星跟踪卫星（SST—LL）重力测量卫星的关键载荷之一，其性能直接影响地球重力场空间变化率的测定结果，而KBR系统中超稳振荡器（USO）的稳定度对KBR系统整体测距精度有着重要影响。文章根据双向测量载波相位对比原理和USO幂率谱模型，对KBR系统进行了建模。首先，描述了测距系统的基本原理、系统功能组成及适用于KBR系统的数学模型；然后，利用Matlab软件对“重力恢复和气候实验”（GRACE）卫星的KBR系统进行了仿真。仿真结果表明，采用该模型和方法后获得的双向测距中误差（RMSE）为9．81μm，与公布的GRACE卫星KBR系统10μm的中误差相符。文章为KBR系统的工程设计提供了仿真分析工具，可为工程应用提供设计参考。
K빈단미파측거（KBR）계통시저-저위성근종위성（SST—LL）중력측량위성적관건재하지일，기성능직접영향지구중력장공간변화솔적측정결과，이KBR계통중초은진탕기（USO）적은정도대KBR계통정체측거정도유착중요영향。문장근거쌍향측량재파상위대비원리화USO멱솔보모형，대KBR계통진행료건모。수선，묘술료측거계통적기본원리、계통공능조성급괄용우KBR계통적수학모형；연후，이용Matlab연건대“중력회복화기후실험”（GRACE）위성적KBR계통진행료방진。방진결과표명，채용해모형화방법후획득적쌍향측거중오차（RMSE）위9．81μm，여공포적GRACE위성KBR계통10μm적중오차상부。문장위KBR계통적공정설계제공료방진분석공구，가위공정응용제공설계삼고。
The K band ranging (KBR) system is one of the most important instruments of the low-low satellite-satellite tracing (SST-LL) gravity measurement satellite which directly affects the Earth gravity field space resolution. The stability of ultra stable oscillator (USO) has a great influence on the whole performance of the KBR. Based on the dual one-way ranging principle and USO power law model, a system structure is presented for high precision KBR measurement sim- ulation. The basic principle, function composition and appropriate mathematical models used in the simulation are studied, and a simulation system is proposed to simulate KBR of GRACE with Matlab. The result shows that the root mean square error(RMSE) of dual one-way ranging is 9.81μm, which is the same as that of KBR in GRACE (10μm). The model can be considered as a simulation and analysis tool for KBR system design and a reference for the project application.