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意思是说各种指数在不同档次 的不同的表格？
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这个表格如何获取的？看上去远比俺当年用过的曲线图复杂多了，只能慢慢研读。
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那个表格是arrl天线手册上提供的，是两套表，分为传播总结表“summary tables”和详细传播表“detailed tables”，每套表又根据全球不同位置来区分，每个位置又根据ssn的情况分为6种：“ssn ultra high，ssn very high，ssn high，ssn medium，ssn low，ssn very low”，这些程度是这样划分的：
very low: ssn between 0 to 20, equivalent to solar flux from 64 to 79
low: ssn between 21 to 40, equivalent to solar flux from 80 to 94
medium: ssn between 41 to 60, equivalent to solar flux from 95 to 111
high: ssn between 61 to 100, equivalent to solar flux from 112 to 145
very high: ssn between 101 to 150, equivalent to solar flux from 146 to 193
ultra high: ssn above 151, equivalent to solar flux above 194
一旦你选择了全球某个位置（arrl提供的国内只有by1 beijing,by4 shanghai, by0 lhasa三个位置），和选择某一中ssn情况，则可以进一步选择每个月的传播情况。总结表就是附图中到各个洲的情况，详细表甚至给出了到常用字头的传播情况。
另外注意阅读文档中关于各种信号的测试条件的说明：
discount the s-meter readings to reflect a smaller station, using the following rules of thumb:
subtract 2 s units for a dipole instead of a yagi (20 meters and above)
subtract 3 s units for a dipole at 50 feet instead of a yagi (for 20 meters)
subtract 1 s unit for a dipole at 50 feet rather than a dipole at 100 feet (160 to 40 meters)
subtract 3 s units for 100 w rather than 1500 w (all bands).
备注：ssn = smoothed sunspot number
