Modeling Solar Oscillation Power Spectra. I. Adaptive Response Function for Doppler Velocity Measurements
Modeling Solar Oscillation Power Spectra. I. Adaptive Response Function for Doppler Velocity Measurements
复制标题
太阳振荡功率谱建模。
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
S. Jefferies
中科院分区：
文献类型：
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作者：
S. Vorontsov;S. Jefferies
提高日震反演的精度和分辨率需要更准确地模拟观测的p模功率谱，传统上测量太阳振荡频率。我们提出了一种新的技术，计算响应函数（泄漏矩阵）的多普勒速度测量，主要是基于相关的仪器和物理效应的分析描述。新方法的计算效率允许我们以自适应方式实现响应函数：即，对未知大小的仪器或光学失真的补偿可以作为光谱拟合过程的一部分来执行。
Improving the accuracy and resolution of helioseismic inversions calls for more accurate modeling of the observational p-mode power spectra from which the solar oscillation frequencies are traditionally measured. We present a new technique of calculating the response function (leakage matrix) for Doppler velocity measurements that is based largely on an analytical description of the relevant instrumental and physical effects. The computational efficiency of the new approach allows us to implement the response function in an adaptive manner: i.e., the compensation for instrumental or optical distortions of unknown magnitude can be performed as a part of the spectral fitting procedure.