一種利用C/A碼GPS接收機(jī)實(shí)現(xiàn)電離層延時(shí)雙頻改正的方法
A METHOD FOR DUAL-FREQUENCY IONOSPHERIC TIME-DELAY CORRECTING USING A C/A CODE GPS RECEIVER
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摘要: 電離層傳播延遲是C/A碼GPS導(dǎo)航定位的主要誤差源之一。本文提出了一種利用C/A碼GPS接收機(jī)實(shí)現(xiàn)電離層延遲實(shí)時(shí)雙頻改正的方法,并對實(shí)現(xiàn)這一方法的電路框圖的原理進(jìn)行了分析,從理論上說明了其可行性。
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關(guān)鍵詞:
- GPS系統(tǒng); 電離層延遲; C/A碼雙頻改正
Abstract: Ionospheric time delay is one of the largest error sources in C/A code GPS navigation and positioning. In this paper, a method is proposed for real-time dual-frequency ionospheric time-delay correcting using a C/A code GPS receiver, and the principle of the circuit block diagram for this method is analyzed with its feasibility theoretically demonstrated. -
劉纂余,李征航,王躍虎,桑吉章.全球定位系統(tǒng)原理及其應(yīng)用.北京:測繪出版社,1993,第二章.[2]Klobuchar J A. Ionospheric time-delay algorithm for single-frequency GPS users[J].IEEE Trans. on Aerospace and Electronic Systems.1987, AES-23(3):325-331[3]張孟陽,呂保維,宋文森.單頻GPS導(dǎo)航定位中的電離層延遲改正方法.電波科學(xué)學(xué)報(bào),1997, 12(3): 254-259.[4]沈允春.擴(kuò)譜技術(shù).北京:國防工業(yè)出版社,1995,第四、五章.[5]Van Dierendonck A J, Fenton P, Ford T. Theory and performance of narrow correlator spacing in a GPS receiver. Navigation: Journal of the Institute of Navigation, 1992, 39(3): 265-283. -
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