ACE Solar Wind Ion Composition Spectrometer (SWICS) Solar Wind Plasma Elemental and Isotopic Density, Speed, Thermal Speed, Charge State, and Ratio Parameters, Level 2 (L2), Daily Data

This ACE SWICS/SWIMS Data Set contains the He/O, C/O, N/O, Ne/O, Mg/O, Si/O, S/O, Fe/O Abundance Ratios, C, O, Mg, Si, Fe Average Charge States, C+6/C+4, C+6/C+5, O+7/O+6 Charge State Ratios, He+2, C+5, O+6, Fe+10 Speeds and Thermal Speeds, and a Solar Wind Type Parameter that characterizes the Solar Wind as either Streamer, Coronal Hole, Coronal Mass Ejection (CME), or Unidentified. The Solar Wind Ion Composition Spectrometer (SWICS), prior to August 23, 2011 and denoted as SWICS Version 1.1, determines uniquely the Chemical and Ionic Charge State Composition of the Solar Wind, the Temperatures and Mean Speeds of major Solar Wind Ions at all Speeds above 300 km/s for Protons and 170 km/s for Fe+16, and resolves Protons and Helium Isotopes of Solar and Interstellar Sources. SWICS 1.1 measures the Distribution Functions of Interstellar Cloud Pick-Up Ions and Interplanetary Dust Cloud Pick-Up Ions up to Energies of 100 keV/e. The ACE SWICS 1.1 Data Products represent a new Release of the Data with significantly improved Time Series Measurements for the Elemental Abundance, Charge State Composition, and Kinetic Properties of Heavy Ions in the Solar Wind. It is a major new Update produced with completely redesigned Analysis Methods to account more rigorously for Instrumental and Statistical Effects (Shearer et al., 2014). Rare Elements are now identified more reliably and Estimates of Statistical Error are provided. Release Notes are available that describe the Data, the Methods used to determine the Data Values, and Issues concerning Data Quality and Measurement Uncertainty. The Quality of ACE Level 2 Data is such that it is suitable for serious Scientific Study. However, to avoid Confusion and Misunderstanding, it is recommended that Users consult with the appropriate ACE Team Members before publishing Work derived from the Data. The ACE Team has worked hard to ensure that the Level 2 Data are free from Errors, but the Team cannot accept Responsibility for Erroneous Data, or for Misunderstandings about how the Data may be used. This is especially true if the appropriate ACE Team Members are not consulted before Publication. At the very least, Preprints should be forwarded to the ACE Team before Publication. For more Information about the SWICS Instrument, visit the SWICS Home Page at http://solar-heliospheric.engin.umich.edu/ace.

本ACE SWICS/SWIMS数据集包含以下内容：He/O、C/O、N/O、Ne/O、Mg/O、Si/O、S/O、Fe/O丰度比，C、O、Mg、Si、Fe的平均电荷态，C+6/C+4、C+6/C+5、O+7/O+6电荷态比，He+2、C+5、O+6、Fe+10的速度与热速度，以及用于将太阳风划分为冕流（Streamer）、冕洞（Coronal Hole）、日冕物质抛射（Coronal Mass Ejection, CME）或未识别类型的太阳风类型参数。
太阳风离子成分光谱仪（Solar Wind Ion Composition Spectrometer, SWICS）在2011年8月23日之前的版本为SWICS 1.1版，可唯一测定太阳风的化学与离子电荷态成分，以及质子速度高于300 km/s、Fe+16速度高于170 km/s时主要太阳风离子的温度与平均速度，并可区分源自太阳与星际来源的质子及氦同位素。SWICS 1.1可测量星际云pickup离子与行星际尘埃云pickup离子的分布函数，最高能量可达100 keV/e。
ACE SWICS 1.1数据产品属于该数据集的新版，针对太阳风重离子的元素丰度、电荷态成分及动力学特性的时间序列测量实现了显著优化。本次更新为重要的新版升级，采用完全重新设计的分析方法，可更严谨地校正仪器效应与统计效应（Shearer等，2014）。如今可更可靠地识别稀有元素，并提供统计误差估计值。配套的版本说明文档详细介绍了数据集、用于确定数据值的分析方法，以及与数据质量和测量不确定度相关的各类问题。
ACE二级数据（Level 2 Data）的质量足以支撑严谨的科学研究。但为避免混淆与误解，建议用户在发表基于该数据集的研究成果前，咨询相应的ACE团队成员。ACE团队已尽全力确保二级数据无错误，但对于因错误数据或对数据使用方式的误解所造成的问题，团队不承担责任，尤其当用户未在发表前咨询ACE团队相关成员时。在任何情况下，预印本均应在正式发表前转发至ACE团队。
如需了解更多关于SWICS仪器的信息，请访问SWICS官方主页：http://solar-heliospheric.engin.umich.edu/ace。