电离层与对流层模型对北斗RAIM可用性的影响分析

doi:10.11959/j.issn.1000-436x.2015072

Abstract

Abstract:

The ionosphere and troposphere are main error sources of satellite navigation system measurement and main factors of COMPASS availability. The influence of the ionosphere and troposphere delay error model on the RAIM availability of COMPASS is analyzed in simulation where ephemeris datum is adopted, and especially the influence of different troposphere models on RAIM availability in civil aviation is analyzed. The experiment at results shows that the delay error of ionosphere and troposphere changes from 0 to 14.555 9 m and 0 to 23.779 6 m correspondingly. And for the non-precision approach stage of civil aviation, when Saastamoinen model, UNB3 model and Hopfield model are used as the troposphere model of COMPASS respectively, the RAIM availability is 99.308%, 92.041 5% and 100% corre-spondingly. So it is more suitable that Hopfield model is used as the troposphere model of COMPASS and the 99.9% RAIM availability requirement in civil aviation can be achieved using this model.

Key words: COMPASS, ionosphere, troposphere, RAIM availability, non-precision approach

Wei-dong JIAO,Zhi-hu TANG,Xiao-yun SHEN. Analysis of influence of ionosphere and troposphere model on RAIM availability of COMPASS[J]. Journal on Communications, 2015, 36(3): 179-186.

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References 23

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性能需求	远洋航路	本土航路	终端区	非精密进近
精度（95%）	2.0 nmile	1.0 nmile	0.4 nmile	220 m
告警限值	4.0 nmile	2.0 nmile	1.0 nmile	0.3 nmile
告警时间	1 min	30 s	10 s	10 s
漏警率	0.001	0.001	0.001	0.001
误警率	0.000 01/h	0.000 01/h	0.000 01/h	0.000 01/h
可用性	99.9%	99.9%	99.9%	99.9%

Analysis of influence of ionosphere and troposphere model on RAIM availability of COMPASS

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