Is an omni directional antenna pattern really omni directional?
Yes, in a horizontal plane. It’s more like a pancake. A low gain omni would look like a small fat pancake (a pikelet), while a high gain would look like that same pancake flattened out into a thin and long pancake (a crepe). Mmm… pancakes. There will always be a small blind spot (usually where the cable comes in), but if that’s orientated towards the ground then there shouldn’t be any problems.