RADAR = RAdio Detection And Ranging
Sorry that is how the headline was printed.
Radar O”Reilly would disagree
Radar has not been capitalized for a long time. Once an acronym becomes part of the language the capitals are dropped.
My 60’s navigation (US Navy Hydrographic office) books all say radar.
In the 1940s-1950s you would be absolutely correct. But I think this is a case where the acronym has turned into a word. English is always changing and I think this is an example. My 1960 Websters Dictionary does not capitalize the "word" radar.
RADAR? Radio waves through rock? 100 Mhz might see 50 Ft through dry rock at low resolution.