After a week of collecting data and working with nelson61 to try and reproduce the information, attached is a projected contour map of the Nimiq 4 satellite located at 82w.
Note that this map is based soley on user reports of reception (I collected over 70 different reception reports). If you have a reading for Nimiq 4 that you see is not placed on the map, please report it and hopefully nelson61 can find some time to make some additions. The elements that we looked at were satellite size, highest peaking TP (excluding TP 3 & 4 which may still be broadcasting from another Nimiq satellite) and lowest peaking TP, as well as location of the user.
Here is his notes in the last message he sent me on it...
Hope this helps some out, and maybe we can slip this into the Uplink Report