Deep Space 4 / Space Technology 4
Champollion was revived under NASA's New Millennium program as Deep Space 4 / Space Technology 4, again as a joint project of NASA and CNES. In this version, Champollion would be a stand-alone project consisting of an orbiter and a lander, with the focus shifted somewhat to engineering validation of new technologies rather than pure science.
As of March 1999, the baseline mission was to launch in April 2003, reaching comet Tempel 1 in 2006. The sample return element of the mission was at this point contingent on sufficient funding/resources, possibly being replaced with a demonstration of related capabilities.
The lander was approximately 1.5 m high weighing 160 kg; it was to autonomously navigate to the comet from 50 km altitude and anchor itself with a spike. The planned payload included:
- CHARGE, a gas chromatograph/mass spectrometer
- CIRCLE, cameras/microscope/IR spectrometer
- CIVA, panoramic cameras
- CPPP, "physical properties probes" to be driven into the cometary surface
- SATM drill mechanism
- gamma ray/neutron spectrometer
The orbiter was to carry cameras and a dust monitor.
Later in 1999, Space Technology 4 was scaled back to a single spacecraft with no sample return; it was cancelled entirely on July 1, 1999, due to budgetary constraints.
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