Emissions have remained relatively thick as viewed from the unit 1 cam, as illustrated in these screenshots taken over the last few days:
https://www.dropbox.com/s/jrk2xjm8v6mvb20/December%2013%20%20through%20December%2017%202015.pdf?dl=0
I cannot get the TEPCO cam 4 to load and operate so I have no recent views from that cam.
Today, the TBS cam is down as well.
The flashing light is back on today at the Futaba cam but its hard to see much else because the Daiichi plant is very dark.
Here are some representative screenshots from Dec 17:
December 17, 2015 23:45 (PM)
December 17 10:56 AM
December 17 14:35 (PM)