It measures air speed—not ground speed, but the speed of the airplane at altitude.
Thunderstorms at that altitude, the Times of London reports, can have the “energy of nuclear explosions.”
Once acclimatized, the teams will fly to 87° south, where they will spend further time acclimatizing to the altitude.
Were its speed and altitude settled by then, or still uncertain?
It has three sensors which track steps, acceleration, and altitude.
It dropped to an altitude of only a few hundred feet and turned and went back over the ground it had just crossed.
From their altitude of four thousand feet, they could see the Denver.
The rocs had better range and altitude than any planes of equal hauling power.
Long before the funeral train had reached the top of the altitude.
For every 900 feet of altitude the height of the mercury is about one inch less.