[NLRS] Is there published data on tree foliage ...

[Doug Reed]

You have to remember that a DTV signal displays NOTHING unless the
digital data can be decoded and corrected by the software in the
converter box. Only when the signal can be decoded will there be a
picture. Either it is correct and 100% accurate or there is nothing.
The Bit Error Rate (BER) display is probably going to go from 100% to
zero with very few stops in between, like the square edge on a table,
but come back just as fast.

<http://www.digitalproceiver.com/modsci/public/images/whitePapers/televisionproducts/msi4400a/measuring%208vsb.pdf>
This PDF is a good description of ATSC broadcasting and reception and
about slide 15 it has pictures and discussion of how to decode and
display the data, then evaluate it. It may answer some questions.

73, Doug Reed, N0NAS.