P p p - change of pressure in tenths of hectopascal during last 3 hours P p p -过去三小时的气压变量，以十分一百帕斯卡为单位
2.
P p p p - mean sea level pressure in hectopascal and tenths , thousands digit omitted P p p p -平均海平面气压，以十分一百帕斯卡为单位，不包括千位数字
3.
Measurements were first undertaken by aircraft of the far east flying training school at 50 hpa ( hectopascal ) intervals from 1 000 hpa to 650 hpa 量度工作最初由远东航空训练学校担任，探测的高度从1000百帕斯卡至650百帕斯卡，每隔50百帕斯卡量度一次。
