The MarsREM study (ESA Contract 19770/06/NL/JD, 2007) addressed part of this problem by developing the Mars Energetic Radiation Environment Model (MEREM) framework, which has been integrated into SPENVIS. MEREM allows the user to input mission-related information such as mission epoch (defining solar cycle and Martian season), duration, Mars orbit, coordinates of lander/habitat and local soil conditions. MEREM produces a variety of output quantities: particle flux or fluence spectra as a function of species, absorbed dose, effective dose, etc.
MEREM uses the following radiation environment models:
eMEREM only uses the atmosphere composition for single locations and eleveation profiles. The pre-processor is used to determine the amount of air above and the total atmosphere thickness at a given location. The radiation at this location in the atmosphere is calculated using the response function corresponding to the same air depth. For the orbital runs, the trajectory locations are considered to be above the top of the atmosphere (elevation 50 km). For orbital runs, only the soil composition of the polar cap (water ice or dry ice) can be specified.
By default, dMEREM uses the soil composition generated by the pre-processor, both for the surface of Mars and for the moons.
spenvis_mpc.txt
spenvis_mpl.txt
spenvis_atmo.txt
spenvis_soil.txt
spenvis_mes.txt
spenvis_mer.g4mac
spenvis_mer.g4log
spenvis_dmo.txt
spenvis_emr.html
spenvis_emd.txt
spenvis_ems.txt
spenvis_eme.hbook
spenvis_emp.txt
spenvis_emo.txt
To generate plots, select the plot type(s), options and graphics format, and click the button. The current page will be updated with the newly generated plot files.
Lei, F., Mars Energetic Radiation Environment Models (MEREM)—eMEREM Software Design & Justification Document, QINETIQ/IS/AERO/SDD0800770, 2008.