Apogee Mobile Apps

Clear Sky Calculator

This calculator determines the intensity of radiation falling on a horizontal surface at any time of the day in any location in the world. The primary use of this calculator is to determine the need for recalibration of radiation sensors. It is most accurate when used near solar noon in the summer months.
  • Autofill location, date, and time
  • Determine if sensors needs recalibration
  • View intermediate calculation values
  • No internet connection required
  • Easy to use
  • Free

Field of View Calculator

This calculator offers a simple way to estimate visible surface area based on sensor height and angle. You are able to select any Apogee Infrared Radiometer model with differencing fields of view to compare results.
  • Quickly determine IRR target area size
  • View intermediate calculation values
  • No internet connection needed
  • Easy to use
  • Free

Light Unit Converter

This app provides conversions between several light units such as shortwave radiation, photosynthetic photon flux, lux, and footcandles. Choose from several light sources.
  • Choose from common light sources
  • No internet connection needed
  • Easy to use
  • Free