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laomo001木蟲 (著名寫手)
Teacher
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[求助]
請(qǐng)大神幫我潤(rùn)色下摘要
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 我已經(jīng)修改了兩遍，不過(guò)看著還是別扭的，請(qǐng)大神幫我調(diào)節(jié)一下語(yǔ)序和搭配！感謝！ Abstract: The BDS (BeiDou Satellite Navigation System), also known as COMPASS, is a Chinese satellite navigation system which has been developed rapidly in recent years. Although the BDS has been announced to provide services for the whole Asia-pacific region with a constellation of 5GEO/5IGSO/4MEO at the end of 2012, the assessment of BDS Signal-in-Space (SIS) still needs careful research and discussion which has a significant impact on the User-Ranger-Error(URE) of the user. In this paper, with using the entire navigation message and post-processing precise ephemeris in 2014, an initial assessment of BDS Signal-in-Space was presented for all the thirteen BDS satellites. The assessment focus on two aspects of BDS Signal-in-Space Error: 1) For SISURE (Signal-in-Space User Ranger Error) of all BDS satellites, some indicators were used for the SISURE assessment, such as single epoch, month average and annual average among thirteen BDS satellites, at the same time, boxplot was also used for the distribution of SISURE of every satellites, 2) In order to explore the statistics among R(radial), A(along-track), C(cross-track) errors and T(clock) errors, a analysis was carried out, including spatial correlation, normality and SISURE caused by orbit error and clock error. The results show that BDS SIS error is worse than GPS currently, however, it is still better than GLONASS. All the assessment in this paper shows the potential of the BDS system which now is in the third phase of global navigation system construction. |
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laomo001
木蟲 (著名寫手)
Teacher
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3樓2015-07-31 23:13:06
武漢一心一譯 
捐助貴賓 (著名寫手)
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【答案】應(yīng)助回帖
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laomo001: 金幣+50, 翻譯EPI+1, ★★★★★最佳答案 2015-07-31 23:13:24
laomo001: 金幣+50, 翻譯EPI+1, ★★★★★最佳答案 2015-07-31 23:13:24
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Abstract: The BDS (BeiDou Satellite Navigation System), also known as COMPASS, is a Chinese satellite navigation system which has been developed rapidly in recent years. 這一句沒(méi)多大問(wèn)題。 Although the BDS has been announced to provide services for the whole Asia-pacific region with a constellation of 5GEO/5IGSO/4MEO at the end of 2012, the assessment of BDS Signal-in-Space (SIS) still needs careful research and discussion which has a significant impact on the User-Ranger-Error(URE) of the user. 后半句“the assessment of BDS Signal-in-Space (SIS) still needs careful research and discussion which has a significant impact on the User-Ranger-Error(URE) of the user. ”這個(gè)"which"，指的是“the assessment of BDS Signal-in-Space (SIS)”還是“careful research and discussion”，不太清楚，請(qǐng)指明？ 同時(shí)，建議改成這么開頭的“careful researches and discussions should still be conducted for the assessment of BDS Signal-in-Space (SIS)” In this paper, with using the entire navigation message and post-processing precise ephemeris in 2014, an initial assessment of BDS Signal-in-Space was presented for all the thirteen BDS satellites. "with using" 改成 "with the application of" The assessment focus on two aspects of BDS Signal-in-Space Error: 1) For SISURE (Signal-in-Space User Ranger Error) of all BDS satellites【.】 [S]ome indicators were used for the SISURE assessment such as single epoch, month average and annual average among [the] thirteen BDS satellites, 【in adddition,】 boxplot was also used for the distribution of SISURE of every satellites【.】 請(qǐng)查看【】 2)In order to explore the statistics among R(radial), A(along-track), C(cross-track) errors and T(clock) errors, [an] analysis was carried out[on issues]including spatial correlation, normality and SISURE caused by orbit error and clock error. 請(qǐng)查看【】 The results show that [the] SIS error [of BDS] is [more severe] than [GPS error] currently, 【but less severe】 than GLONASS 【error】. All the assessment in this paper shows the 【great】 potential of the BDS system which now is in the third phase of global navigation system construction. 請(qǐng)查看【】，error 用 worse 或者 better修飾不太好. 加上個(gè)great，才能體現(xiàn)assessment意義，更好 |
2樓2015-07-31 17:51:44
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