skipping the hazard shield: command courtyard
From the center of the room, look at the shield and turn until the right corner is directly in front of you. Space jump straight up, delaying the second jump a bit to avoid hitting your head. Now move forward and do two quick screw attacks to land in a safe spot that doesn't have any acid rain.
Turn to face the grapple voltage terminal and try to use it; if you can't, either you or the targeting icon are not close enough. Get closer by staying next to the shield and slowly inching forward alongside it. You won't take damage as long as you don't move left at all or go too far ahead. Once the icon shimmers, drain the shield and proceed to Skyway Access.