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- 2017
基于指数平滑法的GPS卫星钟差预报
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Abstract:
提出了一种基于指数平滑法的GPS卫星钟差预报方法。该方法可采用少量数据建模，且计算过程简单、方便，尤其是在缺少相关历史数据或数据变化趋势不明显、不稳定的情况下，用该方法仍可取得较好的效果。通过与GPS卫星钟差预报中常用的二次多项式模型和灰色预测模型的对比分析，结果表明：指数平滑法适用于GPS卫星钟差的中、短期预报，其预报精度可达ns级；在利用小数据量建模的情况下，其预报效果优于二次多项式模型，与灰色模型的预报效果基本相当；该方法还可用于GPS卫星钟差的长期预报，其预报精度可达μs级，与灰色预测模型的精度相当
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