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首页> 外文期刊>Journal of Spacecraft and Rockets >Simultaneous Analysis of Multi-Instrument Satellite Measurements of Atmospheric Density
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Simultaneous Analysis of Multi-Instrument Satellite Measurements of Atmospheric Density

机译：多仪器卫星大气密度测量的同时分析

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摘要

When several different instruments have been used on the same satellite to measure the thermospheric density, significantly different results have been obtained. For 40 years there have been efforts to resolve these disagreements. Recent improvements in the analysis of drag coefficients and in-track winds have led us to reexamine the measurements of density made by an accelerometer, a mass spectrometer, and a density gauge deployed together on the S3-1 satellite. A simultaneous solution using data from the mass spectrometer and accelerometer significantly reduces the error caused by winds in the auroral zone during geomagnetic storms. A dramatic improvement is obtained among the three instruments by calculating the drag coefficients appropriate to the shape and altitude of the satellite instead of using the previously assumed value of 2.2 at all altitudes. A comparison of several recent studies in which 2.2 was replaced by corrected drag coefficients shows that much of the reported statistical discrepancy of 15% between density measurements and models could be removed by using appropriate drag coefficients in constructing models and in analyzing data.
机译：当在同一颗卫星上使用几种不同的仪器测量热层密度时，已获得了截然不同的结果。 40年来，人们一直在努力解决这些分歧。最近在阻力系数和轨道风分析方面的改进使我们重新检查了由S3-1卫星上同时部署的加速度计，质谱仪和密度计进行的密度测量。使用来自质谱仪和加速度计的数据的同时解决方案可显着减少地磁暴期间极光区风造成的误差。通过计算适合于卫星形状和高度的阻力系数，而不是在所有高度使用先前假定的值2.2，可以在这三种仪器之间获得显着的改进。对几项最近研究的比较，其中用校正后的阻力系数代替2.2，这表明通过在模型构建和数据分析中使用适当的阻力系数，可以消除密度和模型之间15％的统计差异。

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