Re: Drag
Problem: you need to move a parabolic mirror that is pointed/focused at a city from geosync orbit.
a) the mirror is large enough to reflect enough sunlight to light an entire city;
b) the energy density of the sun that lights it up in the day is 'n'
c) you want to reflect 'n * m' energy for night-time visibility, where 'm' represents the fraction of daylight brightness you want at night
d) the surface area of your mirror must be 'city area' x 'n' x 'm', with extra factors added in for reflectivity and atmospheric losses.
So, HOW BIG does that mirror need to be?
Biting the hand that feeds IT
