Hi knowlesy,
could you be more specific on how your radar fails you and what kind of surveys you are conducting?
As a guesswork answer to your problem, could the conductivity (high attenuation) be the reason for this problems? Middle east has very "interesting" soil - the materials in the ground (salt) with more conductivity, shallow water tables (1-2 meters, "dirty" water with free ions desolved).
BR
radar detector
Re: radar detector
"If the only tool you have is a hammer, you will see every problem as a nail."