Planetary regolith surface analogs:optimized determination of Hapke parameters using multi-angular spectro-imaging laboratory data

Details Planetary regolith surface analogs:optimized determination of Hapke parameters using multi-angular spectro-imaging laboratory data Planetary regolith surface analogs:optimized determination of Hapke parameters using multi-angular spectro-imaging laboratory data

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icar..165..414c&link_type=abstract

Icarus, Volume 165, Issue 2, p. 414-427.

Statistics

Computation

34

Scientific paper

This work presents a method for a determination of the global set of parameters involved in Hapke's model for planetary surface analogs when dealing with a set of angular conditions representative of the usual range of observation in planetary exploration for spaceborne optical instruments. The present approach is founded on a genetic algorithm: the whole set of Hapke parameters is treated simultaneously without any a priori assumptions. It limits the risk of meeting a local extreme, and the stability and repeatability of the determination are improved. Moreover, it requires less computational time than a Monte Carlo routine. As a demonstration, using multi-angular measurements acquired by a new laboratory wide-field multispectral imaging facility, parameter values for various grain sizes and material compositions of planetary regolith surface analogs are derived and their potential wavelength dependence is studied. The results, coherent with the literature, validate all the steps in our methodology. We focus our interest in the understanding of the physical meaning of Hapke's parameters, in particular of the parameter /θ of the shadowing function for macroscopic roughness. It appears that the features smaller than the centimeter scale contribute predominantly to the photometric effect related to the rocky aspect of planetary soil surfaces. The parameter /θ may thus be mainly considered as an integral of the roughness properties in the submillimetric-centimetric range. Indeed, the most representative case for describing natural regolith surface lies in texture classes in the millimeter range, not involving necessarily a high macroscopic roughness with large surface slopes at hundreds of meters scale. These findings strengthen the case that /θ depends on both the grain size and the material geological properties.

Affiliated with

Also associated with

No associations

Rating

Planetary regolith surface analogs:optimized determination of Hapke parameters using multi-angular spectro-imaging laboratory data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Planetary regolith surface analogs:optimized determination of Hapke parameters using multi-angular spectro-imaging laboratory data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planetary regolith surface analogs:optimized determination of Hapke parameters using multi-angular spectro-imaging laboratory data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1032452