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| 1 | +Landing on a Comet |
| 2 | +================== |
| 3 | + |
| 4 | +Planetary and Space Sciences at Open University |
| 5 | +Analysis of extra terrestrial samples |
| 6 | +Space flight instrumentation |
| 7 | + |
| 8 | +Had to make a really small mass spectrometer to go on the lander < 500g ! |
| 9 | +Aiming to find our what organic materials are present -> what processes occured in comet formation, and did earth water come from comets? |
| 10 | + |
| 11 | +64 m2 of solar panels - 920W at 3AU |
| 12 | + |
| 13 | +Journey took 10 years - flew by several asteroids on the way - in deep sleep for a lot of the journey, nervous about it waking up, but all worked properly |
| 14 | + |
| 15 | +Had to select a landing site, and the lander had to land in November come what may. Engineers want flat, light, smooth, no boulders. Scientists wanted interesting (but survival) |
| 16 | +Had been assuming it was potato shaped, lots of flat areas - but the object turned out to be quite different |
| 17 | +so start selection process again! |
| 18 | + |
| 19 | +Landing - gravity is very week - the force on the lander is about the same as a sheet of paper in earth gravity. |
| 20 | +Lots of stuff prepared |
| 21 | +Story - celebrating in front of the camera, while in the back room the live data stream is not so good ... going pear shaped |
| 22 | +Bouncing - got data from different bits of the comet while bouncing over the surface |
| 23 | +Had to replan the instrument usage in 60 hours - no time for testing, as battery running down |
| 24 | + |
| 25 | +active descent system, harpoons and ice screws all failed |
| 26 | +only the "damping mechanism" kept the lander on the comet |
| 27 | + |
| 28 | +re-established contact with lander 13 June 2015. |
| 29 | +RF link works about 160km, but orbiter mostly further away |
| 30 | +now past closest pass to sun, orbiter will come in close again, establish link to lander again |
| 31 | + |
| 32 | +Offer to do talks in schools |
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