Spectrogoniometry and modeling of martian and lunar analog samples and Apollo soils

► Photometric parameters of soils modeled using new 400-950 nm goniometer data. ► Mars analogs backscattering; some lunar analogs very narrowly forward-scattering. ► Spherule soil experiment mimics some MER Opportunity soil photometric parameters. ► Phase reddening seen at angles <50°; some phase bluing at >50° (<10° for mare soil). ► No lunar analog soil perfectly matches the Apollo soils' photometric parameters.