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題名 | Local Baseline Vectors Using the GPS with an Atmospherically Corrected Ambiguity Function Method=含大氣改正之模稜函數法求解GPS地方性基線向量 |
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作者姓名(中文) | 吳究; 游豐吉; | 書刊名 | 中國土木水利工程學刊 |
卷期 | 10:1 1998.03[民87.03] |
頁次 | 頁1-8 |
分類號 | 440.98 |
關鍵詞 | 大氣改正; 模稜函數; 多參考站; Atmospheric correction; Ambiguity function; Multiple reference sites; |
語文 | 英文(English) |
中文摘要 | 於求解基線向量時,模稜函數法不受GPS載波相位觀測量之整數模稜參數(亦稱 起始週波未定值)及週波脫落影響。本文之目的是執行與電離層改正與多參考站相關之方 法研究。起始的位置近似值與模稜參數整數性皆以最小二乘技術評估之。對長9.03公里之 基線(SPP3至DG3)而言,可驗證電離層效應改正提高第一峰值,並增大第一與第二峰值之 間距。隨公益性GPS衛星追蹤站之設立,模稜函數法容易調適,而彙整多參考站相位數據 。以快速靜態衛星相對定位方式施測4公里乘5公里區域之高程時,檢核精度達0.6公分。 衛星幾何架構變得較差,該精度則惡化為1.8公分。 |
英文摘要 | The ambiguity function method is independent of integer ambiguity parameters and cycle slips, in the GPS carrier phase observables, for the determination of baseline vectors. The objective of this paper is to carry out methodological research in conjunction with ionospheric corrections and multiple reference sites. Both the initial position approximations and the integer characteristics of the wnbiguity parwneters are evaluated by leastsquares techniques. For a baseline of 9.03 km long, SPP3-DG3, an increase in the first peak value and its accompanying greater separation from the second peak are achievable when ionospheric effects are taken into account. With public GPS tracking stations being set up, the ambiguity function method is easily adaptable to the incorporation of phase data from multiple reference sites. In a rapid static mode of relative satellite positioning, it is shown that heights can be determined accurately to about 0.6 cm, for an area of 4 km by 5 km in size. This accuracy is degraded to 1.8 cm when the satellite geometry is poor. |
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