I havn't been able to get back on my home account to be able to download Harmy's DE 2 but just from comparing the shot to this IB screening it seems like he was aiming to match what was going on in the IB reference
http://petergaultney.smugmug.com/Movies/historic/Star-Wars-at-The-Senator/13089279_nXePV#!i=948681807&k=3oFJ2&lb=1&s=A
I'm fairly sure he's done more homework on this than all of us put together!!