(Yeah... not the Jedi way, it seems.)
"You're not going to like this, and there's a lot more to it," Xeth says. "We've uncovered a plot to invade Alura and attack the Republic. A corporation is performing illegal activities outside of Republic space due to restrictions within it. I want to stop it at all costs, Colonel."
In fact it does not lower. You are instead provided with precise instructions about passing through the shield at low velocity, at the right angle.
Like all energy shields it does not fully impair physical objects. It's pretty close in, btw; you have to get very close to atmosphere indeed to get inside it.
for the record: I didn't mean that we should hide our lightsabres, we exit the planet in the clothes and weaponry of our chosing... if they spot it and see what it is, you answer truthfully before that I didn't see a reason to state this
anyway, today was hectic, tomorrow will be too so not much posting I'm afraid