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The KRC web-site [7] allows several ways to access KRC: - Quick run of examples for Diurnal and seasonal temperatures - Submission of a formatted input file that allows access to all KRC features - An interactive interface which accesses most KRC features - Download of source code to build and run at your own site. | The KRC web-site [7] allows several ways to access KRC: - Quick run of examples for Diurnal and seasonal temperatures - Submission of a formatted input file that allows access to all KRC features - An interactive interface which accesses most KRC features - Download of source code to build and run at your own site. | ||
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Revision as of 22:04, 8 January 2019
KRC allows homogeneous physical properties or two zones, each of which may have temperature-dependent thermal conductivity and specific heat, or a large table define material properties versus depth.
KRC uses a one-layer atmosphere that is gray in both the solar and infra-red regions. Radiative transfer and net atmosphere heating are based on a Two-stream Delta-Eddington [2] model for insolation; direct onto sloped surface and diffuse, with possible twilight extension. Dust scattering uses a Henyey-Greenstein phase function [red link: https://en.wikipedia.org/wiki/Louis_G._Henyey}.
The atmosphere may contain a condensing gas, specified by its molecular weight [3] , latent heat of condensation [4] , and a Clausius-Clapeyron saturation relation [5].
Orbits are specified by Keplerian elements [6], pre-converted into a set of geometry terms and rotation matrices for rapid use ; seasons are at uniform increments of time. Mean orbital elements are pre-calculated for any epoch (all planets and several comets and asteroids).
The above capabilities are described in : H.H. Kieffer, Thermal model for analysis of Mars infrared mapping, J. Geophys. Res.: Planets, v.118, 451-570 (2013) Both solar and lunar-like eclipses are supported, with KRC automatically going into a thin-layer, fine-time mode during an eclipse. Both solar and thermal radiative flux from a planet onto its satellite may be included to first-order.
For sloped surfaces, the radiation from the far ground can be based on the surface and atmosphere temperatures of prior KRC runs, such as the upwind side of a dune viewing the temperatures of the down-wind side of a similar dune, with the atmosphere for a regional flat surface. (( The default is for far ground to be at the same temperature as the local slope and the atmosphere radiation exchange to be with the sloped surface; this is reasonable only for low slopes.
The KRC web-site [7] allows several ways to access KRC: - Quick run of examples for Diurnal and seasonal temperatures - Submission of a formatted input file that allows access to all KRC features - An interactive interface which accesses most KRC features - Download of source code to build and run at your own site.
