{
 "id": "pixl-adaptive-sampling",
 "entry": null,
 "name": "Adaptive sampling on Perseverance's PIXL instrument",
 "group": "ran",
 "class": "perception",
 "location": "surface of Mars",
 "operator": "NASA",
 "developer": "NASA Jet Propulsion Laboratory",
 "host": "Perseverance",
 "catalogue": null,
 "dates": {
  "launched": null,
  "ran": "for almost three years to July 2024",
  "reported": "2024-07-16",
  "ended": null
 },
 "hardware": "the rover's own computer, not named",
 "software": "Adaptive sampling software for the PIXL X-ray instrument",
 "did": "Read the instrument's scans of a rock as they came in and decided, on Mars, where to look longer.",
 "marks": [
  {
   "stage": "U",
   "evidence": 1,
   "basis": [
    "c1",
    "c2",
    "c3"
   ]
  }
 ],
 "claims": [
  {
   "id": "c1",
   "kind": "quote",
   "text": "For almost three years, the rover mission has been testing a form of artificial intelligence that seeks out minerals in the Red Planet's rocks.",
   "speaker": "NASA JPL",
   "relation": "operator",
   "source": "nasa-pixl-adaptive-sampling",
   "url": "https://www.nasa.gov/missions/mars-2020-perseverance/perseverance-rover/heres-how-ai-is-changing-nasas-mars-rover-science/",
   "source_title": "Here's How AI Is Changing NASA's Mars Rover Science",
   "publisher": "NASA Jet Propulsion Laboratory",
   "source_kind": "press-release",
   "published": "2024-07-16",
   "published_basis": "page metadata",
   "accessed": "2026-10-04",
   "copy_route": "direct",
   "read": "in part: about seven sentences of 7,600 characters"
  },
  {
   "id": "c2",
   "kind": "quote",
   "text": "This marks the first time AI has been used on Mars to make autonomous decisions based on real-time analysis of rock composition.",
   "speaker": "NASA JPL",
   "relation": "operator",
   "source": "nasa-pixl-adaptive-sampling",
   "url": "https://www.nasa.gov/missions/mars-2020-perseverance/perseverance-rover/heres-how-ai-is-changing-nasas-mars-rover-science/",
   "source_title": "Here's How AI Is Changing NASA's Mars Rover Science",
   "publisher": "NASA Jet Propulsion Laboratory",
   "source_kind": "press-release",
   "published": "2024-07-16",
   "published_basis": "page metadata",
   "accessed": "2026-10-04",
   "copy_route": "direct",
   "read": "in part: about seven sentences of 7,600 characters"
  },
  {
   "id": "c3",
   "kind": "quote",
   "text": "the software autonomously positions the instrument close to a rock target, then looks at PIXL's scans of the target to find minerals worth examining more deeply",
   "speaker": "NASA JPL",
   "relation": "operator",
   "source": "nasa-pixl-adaptive-sampling",
   "url": "https://www.nasa.gov/missions/mars-2020-perseverance/perseverance-rover/heres-how-ai-is-changing-nasas-mars-rover-science/",
   "source_title": "Here's How AI Is Changing NASA's Mars Rover Science",
   "publisher": "NASA Jet Propulsion Laboratory",
   "source_kind": "press-release",
   "published": "2024-07-16",
   "published_basis": "page metadata",
   "accessed": "2026-10-04",
   "copy_route": "direct",
   "read": "in part: about seven sentences of 7,600 characters"
  }
 ],
 "conflicts": [],
 "notes": "Graded U, not R, because the release reports use over years. No launch mark is given: the claim is about software on a rover already on Mars.",
 "changed": "Added on 4 October 2026, in the second round of reading.",
 "headline": "U1"
}