Classification: Balloon package.
Mission: Explore the Martian landscape.
Features: This is a project The Planetary Society has been working to foster. It does not currently have a launch date. The balloon is designed to become buoyant enough to lift its instrumented guide rope when heated by the sun in the daytime and to sink when cooled at night, letting the guide rope contact the surface. Electronics are fitted within 24 interconnected, partially nested, articulated conical titanium segments, which make up the snake or guide rope. It carries various sensors and spectrometers, radar, data management system, transmitter, and batteries. It is intended to survive for ten Martian days and nights.