Space Weather: A Geometric Model Applied to Earth-directed LASCO Halo Coronal Mass Ejections (CMEs)

一个创新的，但相对简单的模型将被应用于太阳日冕物质抛射（CME）的观测与SOHO航天器上的LASCO仪器。 从1996年获得的数据开始，将使用最初由Zhao、Plunkett和Liu开发的圆锥模型分析大约150个指向地球的CME（或所谓的“晕”）。 从这个模型中，人们可以，在原则上，能够推导出的大小和过境时间的地球有效的日冕物质抛射。 这些信息对空间天气预报员非常有用。 如果该方法被证明是有效的，这项工作的第二个组成部分将涉及与NOAA空间环境中心的空间天气预报员合作，开发有效的操作技术，以根据LASCO图像序列估计CME的旅行时间。

An innovative, but relatively simple, model will be applied to solar Coronal Mass Ejection (CME) observations made with the LASCO instrument on board the SOHO spacecraft. Starting with data obtained in 1996, some 150 Earth-directed, or so-called "halo", CMEs will be analyzed using a conical model originally developed by Zhao, Plunkett and Liu. From this model one may, in principal, be able to deduce sizes and transit times of geoeffective CMEs. This information would be extremely useful to Space Weather Forecasters. If the method proves to be effective, a second component of this effort would involve working with Space Weather Forecasters at NOAA's Space Environment Center to develop efficient operational techniques to estimate CME travel times based on sequences of LASCO images.