"John S" wrote in message
...
Thoughts?

That is about 7 feet at 434 MHz; hope there is nothing in the way.

The target application is for a remote water level sensor in the
countryside. No problem with height there.

HI
At UHF total and permanent clearance of the Fresnel zone
is the rule for reliable results.
Directional antennas at both sides helps a lot too but higher is always
better
At such low height rain ,snow and even cutting the grass will produce
variations.