雙向衛(wèi)星時(shí)間頻率傳遞技術(shù)中若干參數(shù)測定與研究
發(fā)布時(shí)間：2018-07-31 07:04
【摘要】：時(shí)間服務(wù)是國家的基本技術(shù)支撐，高精度的時(shí)間傳遞和同步問題是時(shí)間服務(wù)的重要組成部分，同時(shí)也是國際原子時(shí)的穩(wěn)定延續(xù)和現(xiàn)代科技發(fā)展的重要技術(shù)支撐。雙向衛(wèi)星時(shí)間頻率傳遞技術(shù)(TWSTFT)已證明是準(zhǔn)確度和穩(wěn)定度都很好的時(shí)間傳播手段，在短期時(shí)間內(nèi)其穩(wěn)定度測試結(jié)果與理論一致，現(xiàn)在正在進(jìn)行長期穩(wěn)定性的研究。 雙向衛(wèi)星時(shí)間頻率傳遞技術(shù)中有很多可操作參數(shù)，其中射頻頻率和擴(kuò)頻碼速率是最重要也最有可能影響到雙向衛(wèi)星時(shí)間頻率傳遞穩(wěn)定度和準(zhǔn)確度的兩個(gè)參數(shù)。為了研究該參數(shù)對(duì)雙向衛(wèi)星時(shí)間頻率傳遞的影響程度，采用中國科學(xué)院國家授時(shí)中心的CAPS地面測軌網(wǎng)和中衛(wèi)衛(wèi)星等設(shè)備進(jìn)行試驗(yàn)所得的試驗(yàn)數(shù)據(jù)，進(jìn)行數(shù)據(jù)分析處理并得出結(jié)論。本文所做主要工作如下： 1.簡單介紹了雙向時(shí)間頻率傳遞技術(shù)的發(fā)展情況和論文研究的背景及意義； 2.闡明了雙向衛(wèi)星時(shí)間頻率傳遞技術(shù)的原理并對(duì)其誤差進(jìn)行了分析，給出了本次試驗(yàn)的兩種方法——三站閉合法和零基線法，并介紹了其原理； 3.基于三站閉合法和零基線法對(duì)試驗(yàn)所得的關(guān)于不同射頻頻率的雙向試驗(yàn)數(shù)據(jù)進(jìn)行分析，得出結(jié)論：射頻頻率為6047M是雙向衛(wèi)星時(shí)間傳遞技術(shù)中比較理想的射頻頻率，但是兩種射頻頻率的精度和準(zhǔn)確度差異很小，在同一個(gè)量級(jí)，所以在實(shí)際的雙向衛(wèi)星時(shí)間頻率比對(duì)中，可以考慮整體的性價(jià)比，再?zèng)Q定采用哪種射頻頻率； 4.基于三站閉合法和零基線法對(duì)試驗(yàn)所得的關(guān)于不同擴(kuò)頻碼速率的雙向試驗(yàn)數(shù)據(jù)進(jìn)行分析，得出結(jié)論：在相同擴(kuò)頻碼速率的條件下，精度基本保持一致，系統(tǒng)差也在同一水平；在不同擴(kuò)頻碼速率的條件下，，精度值隨著擴(kuò)頻碼速率的增大而提高，不同擴(kuò)頻碼速率對(duì)雙向衛(wèi)星時(shí)間頻率傳遞的系統(tǒng)差有一定的影響，但是沒有明確的規(guī)律。
[Abstract]:Time service is the basic technical support of a country. High precision time transfer and synchronization is an important part of time service, and it is also an important technical support for the stable continuation of international atomic time and the development of modern science and technology. The bidirectional satellite time-frequency transfer technique (TWSTFT) has been proved to be a good time propagation method with good accuracy and stability. In a short period of time, the stability test results are in agreement with the theory, and the long-term stability is being studied. There are many operational parameters in bidirectional satellite time-frequency transfer technology, of which RF frequency and spread spectrum rate are the most important and most likely to affect the stability and accuracy of bidirectional satellite time-frequency transmission. In order to study the influence of this parameter on the time-frequency transmission of bidirectional satellites, the experimental data obtained from the CAPS ground orbit network and Zhongwei satellite were used in the National time Service Center of the Chinese Academy of Sciences. Analyze the data and draw a conclusion. The main work of this paper is as follows: 1. This paper briefly introduces the development of bidirectional time and frequency transfer technology and the background and significance of the research. 2. The principle and error of bidirectional satellite time-frequency transfer technique are expounded. Two methods of this experiment, the three-station closing method and the zero-baseline method, are given, and the principle is introduced. 3. Based on the three-station closure method and the zero-baseline method, the bidirectional experimental data of different RF frequencies are analyzed. It is concluded that the radio frequency of 6047m is the ideal radio frequency in the bidirectional satellite time transfer technology. However, the accuracy and accuracy of the two kinds of RF frequencies are very small, which is of the same order of magnitude, so in the actual two-way satellite time-frequency comparison, we can consider the overall performance-price ratio, and then decide which RF frequency to adopt; 4. Based on the three-station closure method and the zero-baseline method, the bidirectional test data of different spreading code rates are analyzed. It is concluded that under the same spread code rate, the accuracy is basically the same, and the system difference is at the same level; Under the condition of different spread spectrum code rate, the precision value increases with the increase of spread spectrum code rate. Different spread spectrum code rate has certain influence on the system difference of bidirectional satellite time and frequency transmission, but there is no clear rule.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：P127.1
[Abstract]:Time service is the basic technical support of a country. High precision time transfer and synchronization is an important part of time service, and it is also an important technical support for the stable continuation of international atomic time and the development of modern science and technology. The bidirectional satellite time-frequency transfer technique (TWSTFT) has been proved to be a good time propagation method with good accuracy and stability. In a short period of time, the stability test results are in agreement with the theory, and the long-term stability is being studied. There are many operational parameters in bidirectional satellite time-frequency transfer technology, of which RF frequency and spread spectrum rate are the most important and most likely to affect the stability and accuracy of bidirectional satellite time-frequency transmission. In order to study the influence of this parameter on the time-frequency transmission of bidirectional satellites, the experimental data obtained from the CAPS ground orbit network and Zhongwei satellite were used in the National time Service Center of the Chinese Academy of Sciences. Analyze the data and draw a conclusion. The main work of this paper is as follows: 1. This paper briefly introduces the development of bidirectional time and frequency transfer technology and the background and significance of the research. 2. The principle and error of bidirectional satellite time-frequency transfer technique are expounded. Two methods of this experiment, the three-station closing method and the zero-baseline method, are given, and the principle is introduced. 3. Based on the three-station closure method and the zero-baseline method, the bidirectional experimental data of different RF frequencies are analyzed. It is concluded that the radio frequency of 6047m is the ideal radio frequency in the bidirectional satellite time transfer technology. However, the accuracy and accuracy of the two kinds of RF frequencies are very small, which is of the same order of magnitude, so in the actual two-way satellite time-frequency comparison, we can consider the overall performance-price ratio, and then decide which RF frequency to adopt; 4. Based on the three-station closure method and the zero-baseline method, the bidirectional test data of different spreading code rates are analyzed. It is concluded that under the same spread code rate, the accuracy is basically the same, and the system difference is at the same level; Under the condition of different spread spectrum code rate, the precision value increases with the increase of spread spectrum code rate. Different spread spectrum code rate has certain influence on the system difference of bidirectional satellite time and frequency transmission, but there is no clear rule.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：P127.1
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 張升康;王學(xué)運(yùn);王宏博;楊軍;;衛(wèi)星雙向時(shí)間頻率傳遞校準(zhǔn)技術(shù)綜述[J];宇航計(jì)測技術(shù);2013年01期
2 王黨衛(wèi);;時(shí)間統(tǒng)一系統(tǒng)研究[J];現(xiàn)代導(dǎo)航;2012年06期
3 張滬玲;李群續(xù);趙景磊;;衛(wèi)星雙向?qū)r(shí)應(yīng)用系統(tǒng)設(shè)計(jì)[J];電訊技術(shù);2012年10期
4 武文俊;李志剛;李孝輝;楊旭海;孔W
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