本文選題：BDS衛(wèi)星鐘 + MGEX鐘產(chǎn)品��； 參考：《測繪學報》2017年02期

【摘要】：北斗衛(wèi)星導航系統(tǒng)(BDS)于2012年底開始提供區(qū)域服務,進行BDS星載原子鐘的長期性能分析,對于系統(tǒng)性能的評估、衛(wèi)星鐘差的確定與預報等具有重要的作用。本文基于3年的多星定軌聯(lián)合解算的BDS精密衛(wèi)星鐘數(shù)據(jù),利用改進的中位數(shù)方法進行數(shù)據(jù)預處理,分析了衛(wèi)星鐘差數(shù)據(jù)的特點,使用衛(wèi)星鐘差二次多項式擬合模型分析了衛(wèi)星鐘的相位、頻率、頻漂及鐘差模型噪聲的長期變化特性,根據(jù)頻譜分析的方法分析了衛(wèi)星鐘差的周期特性,采用重疊哈達瑪方差計算并討論了衛(wèi)星鐘的頻率穩(wěn)定性。綜合上述方法及其試驗結果較為全面地分析和評估了BDS星載原子鐘的長期性能,得到結論:在噪聲特性和鐘漂特性方面,MEO衛(wèi)星鐘的性能最好,其次是IGSO衛(wèi)星鐘,最差的是GEO衛(wèi)星鐘,所有衛(wèi)星鐘噪聲水平和頻漂的均值分別為0.677ns和1.922×10~(-18);多星定軌條件下的北斗衛(wèi)星鐘差存在顯著的周期項,其主周期分別近似為對應衛(wèi)星軌道周期的1/2倍或1倍;BDS星載原子鐘頻率穩(wěn)定度的平均值為1.484×10~(-13)。
[Abstract]:The Beidou satellite navigation system (BDS) provides regional service at the end of 2012. The long-term performance analysis of the BDS spaceborne atomic clock is important for the evaluation of the system performance and the determination and prediction of the satellite clock difference. This paper uses the improved median method based on the BDS precision satellite clock data of the joint solution of the multi star orbit determination in 3 years. The characteristics of the satellite clock difference data are analyzed. Using the two times polynomial fitting model of satellite clock difference, the long-term change characteristics of the phase, frequency, frequency drift and clock difference model noise are analyzed. According to the spectrum analysis method, the periodic characteristics of the satellite clock difference are analyzed, and the overlapping Hadamard variance is used to calculate and discuss. The frequency stability of the satellite clock is a comprehensive analysis and evaluation of the long-term performance of the BDS spaceborne atomic clock. It is concluded that the performance of the MEO satellite clock is the best in the noise and clock drift characteristics, followed by the IGSO satellite clock, the worst is the GEO satellite clock, and the noise level and frequency drift of all the satellite clocks are both. The values are 0.677ns and 1.922 x 10~ (-18) respectively. There is a significant periodic term for the Beidou satellite clock difference under the condition of multi star orbit determination, and its main period is approximately 1/2 times or 1 times of the corresponding satellite orbit period respectively. The average value of the frequency stability of the BDS spaceborne atomic clocks is 1.484 x 10~ (-13).
【作者單位】： 信息工程大學地理空間信息學院;地理信息工程國家重點實驗室;
【基金】：國家自然科學基金(41674019) 國家重點研發(fā)計劃(2016YFB0501701) 地理信息工程國家重點實驗室開放研究基金(SKLGIE2015-M-1-6)~~
【分類號】：TN967.1

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