How Terrestrial Lava Tubes Validate Off-World Cave Sensing

Every flight cave sensor spends years in Hawaiian pahoehoe, Icelandic Surtshellir, or the Corona lava tube before it ships. Terrestrial analogs are how a passive acoustic quilt goes from a lab demo to a signed-off flight payload. This post walks through the specific validation each named site contributes and how EchoQuilt binds analog traverses to predicted Martian and lunar behavior, so a reviewer can see the physics transfer at TRL 4 to TRL 6.

A JPL instrument team returning from a Hawaii analog campaign frequently faces the same question from a flight review board: does the Mauna Loa traverse data actually tell us anything about Arsia Mons pit behavior, or does the Mars environment rewrite the signal enough that terrestrial validation is theatre? The honest answer is that it depends on which physics you are trying to validate and how carefully the analog was picked. NASA's BASALT program tested Mars cave analog workflows across Hawaiian and Idaho sites specifically to address that skepticism, and the foundational review of lava tubes as astrobiological targets on Earth and Mars set the physical criteria for saying when the analog holds.