I've created an animation of the sun before it dips below the horizon, on August 11th-18th, from three different view-points. The first is slightly above the plaza, the second is ground level from the back of the plaza (the Suntur Wasi is on the left and the ushnu is in front), and the third is directly behind the ushnu in the plaza.
The file is nearly 100mb, so give it a minute to buffer.