CAJ | 학술논문

针对导航星座自主定轨中的UT1-UTC预报误差,分析了其对星座定轨的影响,并对预报精度进行了仿真;给出了基于锚固站的定轨算法,并使用Walker12/3/1星座进行了仿真.结果表明:UT1-UTC预报误差对星座定轨精度影响较大,107 ms的预报误差将引入168 m的星座位置误差;引入锚固站后,这一影响被有效抑制,抑制效果随锚固站测量精度的提高而增强
침대도항성좌자주정궤중적UT1-UTC예보오차,분석료기대성좌정궤적영향,병대예보정도진행료방진;급출료기우묘고참적정궤산법,병사용Walker12/3/1성좌진행료방진.결과표명:UT1-UTC예보오차대성좌정궤정도영향교대,107 ms적예보오차장인입168 m적성좌위치오차;인입묘고참후,저일영향피유효억제,억제효과수묘고참측량정도적제고이증강
The UT1-UTC prediction error is one of the error sources in the autonomous orbit determination of navigation constellation. Its influence is analyzed and its prediction accuracy is simulated. The algorithm of orbit determination is presented based on the anchor ground station. Simulations are executed with the Walker12/3/1 constellation. The results indicate the prediction error largely influences the constellation accuracy. The prediction error of 107 ms brings the constellation position error of 168 m.While using the anchor,this influence is effec-tively mitigated,and the mitigation effect is increased with the improved accuracy of the anchor’s measurement.