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Hello and welcome!
It looks like you have some nice strong signals coming from Des Moines, and another set of weaker signals coming from Cedar Rapids.
If you only care about the Des Moines channels, you can use any of the smaller combo antennas like the Winegard HD7080P or the Antennacraft HD850, and leave the antenna pointed at around compass heading 307 degrees.
If you want to get both Des Moines and Cedar Rapids channels, you will need to get a larger antenna, a rotator, and probably a pre-amp. By getting both markets, you might find some different local programming, and also a lot of duplicate programming. You'll need to decide whether or not the added cost/complexity of this more elaborate antenna setup is justified for the amount of additional programming you might get.
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