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They do have radar altimeters, but radar altimeters face occasional issues. So they usually also bake in various failsafe measures. Sadly the failsafe measures
by generj 10y ago
They do have radar altimeters, but radar altimeters face occasional issues. So they usually also bake in various failsafe measures. Sadly the failsafe measures tend to be the thing which dooms spacecraft, usually in odd ways unpredictable until an actual spacecraft is hurtling towards the ground.
- ge96 10y agoThat is too bad. I wonder if a laser in the front would be useless as the heat build up as it enters the atmosphere would make the "bounce-back" hard to receive.