Frozen volatiles including water ice are much more reflective to S-band radio waves than lunar rocks. Radio waves also have diverse qualities when mirrored off ice than off silicate rock. An analysis from the alerts returned from orbit 234 showed reflection features suggestive of water ice for the permanently shadowed https://icecapsweed45689.blogdigy.com/little-known-facts-about-ice-caps-moonrock-42552857