本文選題：北斗 + SBAS��； 參考：《沈陽航空航天大學(xué)》2017年碩士論文

【摘要】：GNSS在當(dāng)今世界的經(jīng)濟(jì)和軍事領(lǐng)域中起著不可或缺的作用,世界各強(qiáng)國已相繼建設(shè)了自己的GNSS系統(tǒng)。國際民航組織(ICAO)針對民用航空的需要,提出了導(dǎo)航系統(tǒng)的所需導(dǎo)航性能(RNP),體現(xiàn)在精度、完好性、連續(xù)性和可用性四個方面。為滿足民用航空的性能需求,世界各國紛紛發(fā)展自己的星基增強(qiáng)系統(tǒng)(SBAS),以期為廣域范圍內(nèi)的用戶提供精度更高、完好性更強(qiáng)的導(dǎo)航服務(wù)。針對我國建設(shè)日益成熟的北斗衛(wèi)星導(dǎo)航系統(tǒng),有必要研究發(fā)展我國自主的星基增強(qiáng)系統(tǒng),為我國及周邊領(lǐng)域民用航空用戶提供更高質(zhì)量的導(dǎo)航服務(wù)。本文首先對北斗衛(wèi)星導(dǎo)航系統(tǒng)進(jìn)行了說明,介紹了坐標(biāo)系統(tǒng)和時間系統(tǒng),并對北斗導(dǎo)航電文進(jìn)行了研究和分析。隨后對RINEX格式的北斗導(dǎo)航電文文件和觀測值文件的結(jié)構(gòu)做出了說明,給出了利用星歷參數(shù)計算衛(wèi)星空間位置坐標(biāo)的算法。其次對星基增強(qiáng)系統(tǒng)的原理進(jìn)行了闡述,描述了系統(tǒng)組成和數(shù)據(jù)處理過程。重點介紹了幾項誤差處理算法,包括電離層延遲、對流層延遲、衛(wèi)星鐘差、星歷誤差的修正算法。對比分析了格網(wǎng)電離層模型和Klobuchar模型校正電離層延遲的結(jié)果,證明格網(wǎng)電離層模型的校正結(jié)果優(yōu)于Klobuchar模型。最后介紹了北斗星基增強(qiáng)系統(tǒng)完好性監(jiān)測的過程,并對其中的關(guān)鍵技術(shù)進(jìn)行了研究,包括完好性參數(shù)UDRE、RURA和GIVE的算法介紹。并根據(jù)中國大陸構(gòu)造環(huán)境監(jiān)測網(wǎng)絡(luò)(Cmonoc)提供的GNSS觀測數(shù)據(jù)進(jìn)行了仿真分析,結(jié)果證明UDRE和RURA的誤差分析結(jié)果可以應(yīng)用于航路導(dǎo)航直至終端進(jìn)近階段,而GIVE的誤差分析結(jié)果不夠理想,是選取的參考站數(shù)目過少,導(dǎo)致相應(yīng)的格網(wǎng)電離層模型建立得不夠精確所致。
[Abstract]:GNSS plays an indispensable role in the economic and military fields of today's world. Every powerful country in the world has built its own GNSS system one after another. Aiming at the needs of civil aviation, the International Civil Aviation Organization (ICAO) puts forward the required navigation performance of the navigation system, which is embodied in four aspects: accuracy, completeness, continuity and availability. In order to meet the performance requirements of civil aviation, countries all over the world have developed their own space-based augmentation system (SBASA), in order to provide a more accurate and perfect navigation service for wide-area users. In view of the increasingly mature Beidou satellite navigation system in China, it is necessary to study and develop our own satellite based augmentation system to provide higher quality navigation services for civil aviation users in China and its surrounding areas. In this paper, the Beidou satellite navigation system is introduced, the coordinate system and time system are introduced, and the Beidou navigation message is studied and analyzed. Then, the structure of Beidou navigation message file and observation value file in RINEX format is explained, and the algorithm of calculating satellite space position coordinate by using ephemeris parameters is given. Secondly, the principle of space-based enhancement system is described, and the system composition and data processing process are described. Several error processing algorithms are introduced, including ionospheric delay, tropospheric delay, satellite clock error and ephemeris error correction algorithm. The results of correction of ionospheric delay by grid ionospheric model and Klobuchar model are compared and analyzed. It is proved that the correction result of grid ionospheric model is superior to that of Klobuchar model. Finally, the process of monitoring the integrity of the system is introduced, and the key technologies are studied, including the algorithms of UDRERURA and live. Based on the GNSS observation data provided by Cmonoca, the result shows that the error analysis results of UDRE and RURA can be used in navigation until the terminal approach. The error analysis result of GIVE is not ideal, because the number of reference stations selected is too small, resulting in the establishment of the corresponding grid ionospheric model is not accurate enough.
【學(xué)位授予單位】：沈陽航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN967.1

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