{
  "$type": "site.standard.document",
  "description": "A satellite attitude estimation system includes a determination unit which determines the maximum pixel, which is a pixel with the largest luminance, and the minimum pixel, which is a pixel with the smallest luminance, respectively, in an infrared image, which is an image taken by an infrared…",
  "path": "/patents/1328850",
  "publishedAt": "2022-10-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01S19/40",
    "NEC Corporation"
  ],
  "textContent": "A satellite attitude estimation system includes a determination unit which determines the maximum pixel, which is a pixel with the largest luminance, and the minimum pixel, which is a pixel with the smallest luminance, respectively, in an infrared image, which is an image taken by an infrared sensor of a target satellite that is a satellite whose attitude is to be estimated, an association unit which associates the determined maximum and minimum pixels with coordinates on the 3D structure of the target satellite, respectively, a computation unit which computes normal vectors for a surface including the coordinates associated with the pixel, respectively, over the coordinates associated with each pixel, and a sun direction estimation unit which estimates the direction of the sun relative to the target satellite before the infrared image is taken using the computed normal vectors.",
  "title": "SATELLITE ATTITUDE ESTIMATION SYSTEM AND SATELLITE ATTITUDE ESTIMATION METHOD"
}