Radar detects what cannot be seen directly, read as intuition and alertness to distant signals. Something on your radar in a dream is read as a matter quietly approaching your attention.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.