Nadir Emissivity Radiative Transfer Model Sensitivity Studies With Applications to Martian Regolith Fine Fraction

Details Nadir Emissivity Radiative Transfer Model Sensitivity Studies With Applications to Martian Regolith Fine Fraction Nadir Emissivity Radiative Transfer Model Sensitivity Studies With Applications to Martian Regolith Fine Fraction

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004dps....36.4709p&link_type=abstract

American Astronomical Society, DPS meeting #36, #47.09; Bulletin of the American Astronomical Society, Vol. 36, p.1183

Astronomy and Astrophysics

Astronomy

Scientific paper

When particles are in near or close contact, they no longer scatter light like single particles. This is problematic for radiative transfer analyses of the photometric properties of surfaces such as the Martian regolith. Despite the community's best efforts, radiative transfer (RT) models are still inadequately predicting laboratory emissivity measurements at nadir, calling even the most fundamental of model assumptions into question [1]. To address these concerns from an empirical standpoint, we present a series of sensitivity studies performed to quantify the effects of single scattering albedo and asymmetry parameter (packed, unpacked cases) on emissivity in the thermal IR (TES, THEMIS, and mini-TES instrument wavenumber ranges) for micron-sized alpha quartz dust grains. By upgrading numerical algorithms from previous works [2, 3], we utilize hybrid solutions (Mie theory + discrete ordinates RT algorithm [4]) to calculate theoretical nadir emissivity values. We demonstrate that assumptions about the scatterer itself, rather than the machinery of the RT method used, constitute the most crucial aspect of modeling nadir emissivity values.
This work is supported through NASA MDAP (MJW, KMP).
[1] Piatek, J. L., et al. (2003) AAS-DPS #35, #05.04. [2] Moersch, J. E., & Christensen, P. R. (1995) JGR, 100, E4, 7465-7477. [3] Wald, A. E., & Salisbury, J. W. (1995) JGR, 100, B12, 24665-24675. [4] Stamnes, K., et al. (1988) Appl. Opt., 27, 2502-2509.

Affiliated with

Also associated with

No associations

Rating

Nadir Emissivity Radiative Transfer Model Sensitivity Studies With Applications to Martian Regolith Fine Fraction 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 Nadir Emissivity Radiative Transfer Model Sensitivity Studies With Applications to Martian Regolith Fine Fraction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nadir Emissivity Radiative Transfer Model Sensitivity Studies With Applications to Martian Regolith Fine Fraction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1015536