Since the perfection of radar in the 1940s the radiosonde balloons have been tracked with radio signals,permitting wind determinations to be made even when the skies are overcast.

• 自40年代雷达臻于完善以来，无线电探空气球一直通过无线电讯号进行跟踪，从而使得风的测定即使天空云层密布也可进行。