[Antennas] Take off angles for short vertical

[Sam Morgan]

I just installed DXLOG and among all it's many features is one called PropView.
It's requesting I enter take off angles for the various bands from 160m to 10m.

I need help on this please, as I have no clue what they are.

My antenna is a 12 foot tall center loaded vertical (tuned for 40m) located at a 
height of 20 feet, on a flat gravel and tar roof. (*not metal roof*)

For a ground it has sixteen, 13 foot long radials at the base, where it is 
matched for 40m. All other bands are tuned with a tuner in the shack. There is a 
coaxial balun (8 turns of coax) at the base of the antenna and about 60 feet of 
coax to the shack from there.

What take off angles would the group suggest I use for:
160m
80m
60m
40m
30m
20m
17m
15m
12m
10m

TIA for the help.
-- 
GB & 73's
KA5OAI
Sam Morgan