- Jan 1, 1970
Ancient_Hacker said:You have to watch out for specmanship with these statistics.
The average space environment isnt too bad, but there are occasional
"cosmic rays" with really high energies, some higher than can be
simulated on Earth. IIRC there was one cosmic ray measured at enough
energy to have moved a baseball!
So a stat of say 10% leakage degradation at 1000 Rads over 1000 hours
isnt terribly meaningful. That number doesnt tell you anything about
what happens when one 800MeV particle hits your 74HC04.
It's like saying nobody is affected by traffic accidents as the average
person gets hit by 0.00003 of a car per year.
You have to design in error-detection and correction circuitry if you
want the electronics to survive a serious cosmic ray.
Or surround your electronics with baseballs.