DARE's mission is to measure the shape of the redshifted 21-cm signal over a radio bandpass of 40–120 MHz, observing the redshift range 11–35, which correlate to 80–420 million years after the Big Bang. DARE orbits the Moon for 3 years and takes data above the lunar farside which is the only location in the inner Solar System proven to have no human-generated radio frequency problems.