{
  "classification": "Arithmetic evaluation of the right-hand side of a published approximate inequality; not executed image recovery or operational upper guarantee",
  "source": "https://arxiv.org/pdf/2002.06492v2",
  "doi": "10.1103/PhysRevD.102.024038",
  "locator": "Eqs152-153, manuscript p28; NIAC PhaseII section2.4.4",
  "formula": "tpix <= 3.54e-3*N*SNR_R^2*[1+0.79*(650/z)^5.1+0.05*(z/650)^2.65]*d^-3*(z0/30)^2*(650/z)^3.4 seconds; displayed value is RHS, total=N*RHS",
  "units": {
    "z": "AU",
    "z0": "parsec",
    "d": "metre",
    "N": "total pixels (side squared)",
    "year": "365.25 days"
  },
  "fixed_assumptions": "Full-phase Lambertian Earth/Sun analogue, broadband albedo0.3 and incident irradiance1366.83W/m2; solar-corona-dominated shot noise assuming mean corona removal and an annular coronagraph; empirical filtering factor a=10 retained from the paper; SNR_R=7 after deconvolution, target30pc, observer650AU, one sequential sampler.",
  "exclusions": [
    "No travel time, slews, downlink, downtime, navigation or mission lifetime.",
    "Not a prediction for the synthetic 6m optical benchmark, whose noise and source are different.",
    "Do not equate N with side length, or combine these fixed-input scalings with different published megapixel scenarios.",
    "Aperture/noise/filter/source assumptions can change results; the paper inequality is not an operational guarantee."
  ],
  "reference": {
    "side_pixels": 100,
    "total_pixels": 10000,
    "aperture_m": 1,
    "output_snr": 7,
    "observer_AU": 650,
    "target_pc": 30,
    "pixel_rhs_seconds": 3191.6639999999998,
    "total_rhs_seconds": 31916639.999999996,
    "total_rhs_Julian_years": 1.0113772910487488
  },
  "two_metre_comparison": {
    "side_pixels": 100,
    "total_pixels": 10000,
    "aperture_m": 2,
    "output_snr": 7,
    "observer_AU": 650,
    "target_pc": 30,
    "pixel_rhs_seconds": 398.95799999999997,
    "total_rhs_seconds": 3989579.9999999995,
    "total_rhs_Julian_years": 0.1264221613810936
  }
}