Why is ATSC on VHF so damn finicky?

[benman94]

Here's a TV fool report for their location:

http://www.tvfool.com/?option=com_wr...00134b9f3ba862

Some of the Detroit stations seem to have gone missing from the TVFool database, but my point can still be made. WJRT blinks in and out all the time, WILX, WJBK, and CBET, which came in just fine in the analog era, haven't been picked up since the analog shutoff.