Our friend Jason got the main idea for the bassline, but the notes are wrong.
Try this approach:

Artist: Ozric Tentacles
Album: Arborescence
Song: There's a Planet Here

Standard Tuning
Moderate Speed (listen to song for timing)

*=slight pause
G-----------------------------------------
D-----------------5-----------------------
A--3*-3-3-5*-5-5-6-6-5-3*-3-3-6*-6-6-6-5--
E------3------5------------3------6-----6-

{Repeat}

BTW it's a kick-ass bassline. I love it!