This is not an assumption, the resources are out there to know this.
You're assuming that the SV channels are surely on the same (or 100% overlapping) spot beam as the LIL channels and I don't think that's a reasonable assumption.
We have transponder maps that show where the locals are located (along with indicators that show the virtual remaps for areas where SV channels are carried, they don't reuplink them, they just remap the existing LIL feed):
The significantly viewed list is on the FCC site to know which counties and/or towns neighboring stations can be carried:
Spot beam maps are available too that show where the signal starts to die off.
Edited by KyL416, 08 March 2014 - 01:29 PM.