  This is a mission to explore the surface of Venus from low altitudes. The
Calypso Venus Scout consists of a high-altitude balloon and a instrumented
Descent Module (DM). The DM is deployed to an altitude of 10-25 km by means of
a Tether where it obtains images, with meter and centimeter scale resolution,
and rough IR spectra. It is reeled-in after several hours for a "cool down"
cycle, then deployed again. The balloon remains at high-altitude with no need
to be fortified to survive high-T and high-P of Venus' lower atmosphere.
