1) Measuring device 2) Measuring instrument 3) Measuring system 4) Microwave radar 5) Microwave technology 6) Radar 7) Radio detection and ranging 1) Radar 
Radiolocating is the process of finding the location of something through the use of radio waves. It generally refers to passive uses, particularly radar—as well as detecting buried cables, water mains, and other public utilities. It is similar to radionavigation, but radiolocation usually refers to passively finding a distant object rather than...
radiodetermination used for purposes other than those of radionavigation
Radiolocation is the original and now old term for Radar.