https://phys.org/news/2018-07-disruption-tolerant-networking-internet-space.html

The Science Mission Directorate looks forward to incorporating DTN into future missions and has identified the Plankton, Aerosol, Cloud, ocean Ecosystem, or PACE, mission as the first key opportunity to demonstrate this revolutionary capability.

NASA's Jet Propulsion Laboratory in Pasadena, California, first tested DTN during a science mission to a comet in 2008. That technology demonstration proved out the capability of DTN as part of the Deep Impact—EPOXI mission. PACE will take an important next step in using DTN as part of daily operations.