Trevor, based on the panorama that Donovan linked to, the 3D chroma-key wall that was first seen is nowhere in the HD studio, so for now, it's current location is unknown. However, there are several spots in the former SD studio that are still used.
Based on the end of the special Cantore WCL 7 PM 'cast from last week, I got a broader idea of where the Satellite Center was, and it seems to be located somewhere to the left or right of the GFC, which is in the former SD studio. However, the Satellite Center had to have been built sometime after the HD studio went into full use on all shows in 2008, or maybe when Studio 1B (the studio that was in front of the GFC directly) had broadcasts terminated from it and moved to Studio 1A.
Courtesy Jae
That's the HD Studio, right?
Eh, No. I believe that Was TWC's first floor/Basement layout before they built the HD studio.
That is the old SD studio, circa sometime in 2007.