well i found what is 92L (invest) on a visible sat... not sure how to post link... its from the Global Hydrology and Climate Center, GOES-E HURRICANE Visible Satellite Data, web page.... My image is centered at Latitude= 23.44° N Longitude= 74.93° W (X=352 Y=188).... and i did a medium range zoom and 25 frames of loop..... It's cleary visible to my eye of the surface rotation.... no storms near the center.... most of convection is to the east.... and its right exactly where early1.png file is pointing....

Here's the main page

http://weather.msfc.nasa.gov/GOES/goeseasthurr.html