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Tsuyoshi Sakamoto (JSGA)

Review:Hejduk “ Specular and Diffuse Components in Spherical Satellite Photometric Modelling ” (AMOS2011). Tsuyoshi Sakamoto (JSGA). Introduction. Derive the physical properties of the space debris by optical observations Space debris:Lambertian sphere

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Tsuyoshi Sakamoto (JSGA)

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  1. Review:Hejduk “Specular and Diffuse Components in Spherical Satellite Photometric Modelling” (AMOS2011) Tsuyoshi Sakamoto (JSGA)

  2. Introduction • Derive the physical properties of the space debris by optical observations • Space debris:Lambertian sphere • This model does not well fit the observed light curve Debris-observer distance apparent magnitude of the Sun in V-band Phase angle Cross section bond albedo

  3. New models • Diffuse-specular model(β:mixing coefficient) • Diffuse-lunar model(F2->F3) • Adding Earthshine Diffuse Lambertian sphere(β=1) specular sphere (β=0) Effects of full moon (β=0)

  4. Diffuse+specular model

  5. Effects of Earthshine Magnitude by Earth illumin. is very faint Essential effects At large phase angle

  6. Best model

  7. mixing coefficient

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