SIMRIW with Python

Install

• pip install -U git+https://ky0on@bitbucket.org/ky0on/pysimriw.git

SIMRIW variables

• DVI
  • 0.0 at crop emergence
  • 1.0 at heading
  • 2.0 at maturity
• SCAT
  • scattering coefficient
• RCAN
  • reflectance when the surface is completely covered by the vegetation
• RSOL
  • reflectance of bare soil
• REF
  • canopy reflectance
• KREF
  • maybe empirical constant
• ABSRAD
  • amount of radiation absorbed by the canopy

Cultivar Parameters

• GV (unit=days)
  • related to crop phenology up to heading
  • minimum number of days required for heading of a cultivar
• ALF (no unit)
  • related to crop phenology up to heading
  • empirical constant
• TH (unit=C)
  • related to crop phenology up to heading
  • temperature at which DVR is half the maximum rate at the optimum temperature
• BDL (no unit)
  • related to crop phenology up to heading
  • empirical constant
• LC (unit=hours)
  • related to crop phenology up to heading
  • critical daylength
• DVIA (no unit)
  • related to crop phenology up to heading
  • at which the crop becomes sensitive to photo-period
• TCR (unit=C)
  • empirical constant
• GR (unit=days)
  • for crop phenology during ripening phase
  • minimum number of days for grain-filling period
• KCR (no unit)
  • for crop phenology during ripening phase
  • empirical constant
• EXTC (no unit)
  • related to dry matter production
  • extinction coefficient of the canopy to daily short-wave radiation
• COVES (unit=G/MJ)
  • related to dry matter production
  • radiation conversion efficiency (maybe)
• HIMX (no unit)
  • maximum harvest index
• CTR (unit=C)
  • critical temp. for autumn coolness.
• A (unit=/day)
  • related to leaf area growth
  • maximum relative growth rate of LAI (m^2/m^2)
• KF (no unit)
  • related to leaf area growth
  • empirical constant
• ETA (no unit)
  • related to leaf area growth
  • empirical constant
• FAS (no unit)
  • related to leaf area growth
  • asymptotic value of the leaf area index when temperature is non-limiting (m^2/m^2)
• TCF (unit=C)
  • related to leaf area growth
  • minimum temperature for LAI growth
• BETA (no unit)
  • related to leaf area growth
• THOT (unit=C)
  • related to cooling-degree-days for spikelet sterility
  • based on 'cooling degree-day’ concept (always 22)
• STO (unit=%)
  • related to cooling-degree-days for spikelet sterility
  • empirical constant (maybe)
• BST (no unit)
  • related to cooling-degree-days for spikelet sterility
  • empirical constant (maybe)
• PST (no unit)
  • related to cooling-degree-days for spikelet sterility
  • empirical constant (maybe)