Thermal soaring group: there is no activity for report.
热气流滑翔组：小组暂时没有活动报告。
When soaring in thermal currents, the lower pilot has a priority on right-of-way (it is difficult for him to observe the situation in general).
在进行热气流翱翔时．高度低的飞行员拥有优先通行权（因为他一般难以观察上方情况）。
The Observatory routinely calculates two commonly used weather indices which are useful for estimating the soaring conditions, namely the Thermal Index and the Soaring Index.
天文台利用京士柏气象站的最新气球探空数据，计算两个天气指数，即热力指数和滑翔指数，以供用家参考。
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