Comparative Table
STEEP320 STEEP321 STEEP322 STEEP323 INCA333
Reflection Model Gray Uniform Specular-Diffuse (GUSD) Uniform Specular-Diffuse (USD) General Specular-Diffuse (GSD) Three-Component (3C) BRDF model Three-Component (3C) BRDF model
Max. Number of Wavelengths 201 2001 1001 501 1
Max. Number of Incidence Angle for Materials N/A N/A 91 10 10
Cavity shape Axisymmetrical
Axisymmetrical
Axisymmetrical
Axisymmetrical

 Cylindrical, with flat inclined bottom and flat diaphragm
Calculation of Radiance Temperatures Yes Yes Yes Yes Yes
Monte Carlo calculations Simultaneous
(for all wavelengths at one run)		 Simultaneous
(for all wavelengths at one run)		 Sequential (wavelength-by-wavelength) Sequential (wavelength-by-wavelength) Sequential (wavelength-by-wavelength)
Total Effective Emissivity and Radiation Temperature Calculation Yes Yes No No No
Max. Number of Viewing Conditions 201 201 201 201 101
Viewing Condition Types Normal
Directional
Right Conical
Integrated
Local Hemispherical 		Normal
Directional
Right Conical
Oblique Conical
Integrated		 Normal
Directional
Right Conical
Oblique Conical
Integrated
Normal
Directional
Right Conical
Oblique Conical
Integrated
 Normal
Right Conical
Integrated
Max. Number of Points in Cavity Generatrix 201 1001 1001 1001 N/A
Max. Number of Temperature Distributions Computed Simultaneously 1 8 20 8 1
Max. Number of Points in each Temperature Distribution 101 1001 1001 1001 101
Operation System MS Windows 2000 to
MS Windows 7		 MS Windows 2000 to MS Windows 7 MS Windows 2000 to MS Windows 7 MS Windows XP+SP2 to MS Windows 7 MS Windows XP+SP2 to MS Windows 7
Minimal Screen Resolution 1024×768 1280×720 1280×1024 1600 × 1024 1600 × 1024
Minimal hard disk space 10 MB 20 MB 20 MB 25 MB 25 MB
Recommended RAM 2 MB 2 MB 2 MB 3 MB 3 MB
Recommended CPU frequency 1 GHz 1 GHz 1.66 GHz 2 GHz 1.66 GHz