Discussing problems of how to forecast ETA (estimated time of arrival) in given bad weather conditions of an air-space within the reach of monitoring radars.

研究了在危险天气条件下，在雷达管制空域下，计算航空器预达时间的问题。

youdao

Authorities immediately blamed ETA, which has killed an estimated 800 people over 32 years in its attempt to create an independent homeland in northern Spain and southern France.

CNN: Thousands pay tribute to latest ETA victim