The effect on the number of sighting star, the precision of star sensor and the change of sampling period to the error determination is analyzed and compared.

分析比较了同时瞄准恒星的个数、星敏感器的精度以及改变采样周期对航天器定位误差的影响。

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In the field of analysis and testing, standard material plays an important role in the research of qualitative and quantitative methods and also in error determination.

标准物质在分析测试领域中无论在定值、方法的研究、误差确定等方面都有着重要地位。

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The 52-year-old, working for a South African broadcaster at the World Cup, believes West Ham keeper Green needs to show great determination to bounce back after his costly error.

BBC: World Cup 2010: David James will play against Algeria