There's a useful power-substitution-formula that will allow you to use the banpao formula in upward wind. It allows you to make long range shots in this difficult wind condition with more accuracy than guessing power or attempting full power shots would. Remember it's for perfectly upward wind, if the wind is even a little bit forward or back the formula will not work.Basically the formula gives you a way to measure how much power to subtract from the fixed power levels used in banpao shooting. The original formula was made by HongHong, but Talent on the feel forums tweaked it to come up with something more accurate -
First measure your angle as you usually would with banpao, then do this math:
1/2 SD POWER: 2.5 - [(wind-2)/30] +0.05
1.0 SD POWER: 2.6 - [(wind-2)/30] +0.1
The result will be a very small number, and this number will be how much power you should subtract from your shot in fractions of 1 bar. For example:
Enemy is 3/4 screens away exactly. Wind is 20 straight up.
Normal banpao angle and power (in 0 wind) would be angle 75, 2.6 bars.
Using the formula for 1sd, substitute the wind strength:
2.6 -[(20-2)/30] +0.1
First the easy part, we take care of 2.6 + 0.1 and get 2.7;
Now it's 2.7 - [18/30]
Dividing 18/30 gives us .6 ... so the math now is 2.7 - .6
final result: Angle 75, 2.1 bars will hit an enemy 3/4 screen distance in 20 wind straight up.