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Measurement of reflected solar irradiance is receiving significant attention by industry, military, and government agencies to assess potential impacts of glint and glare from growing numbers of solar power installations around the world. This website describes tools to evaluate solar glare and receiver irradiance.

The Principal Investigator of this work is Dr. Clifford K. Ho (

Solar Glare Hazard Analysis Tool

This tool determines when and where solar glare can occur throughout the year from a user-specified PV array as viewed from user-prescribed observation points. The potential ocular impact from the observed glare is also determined, along with a prediction of the annual energy production. Configurations can be quickly modified (e.g., tilt, orientation, shape, location) to identify a design that mitigates glare while maximizing energy production.

Meets FAA glare analysis requirements (78 FR 63276).

SGHAT requires a modern web browser


Tower Illuminance Model

The Tower Illuminance Model ("TIM") is a real-time interactive concentrating solar field simulation. TIM models a concentrating tower (receiver), heliostat field, and potential reflected glare based on user-specified parameters such as field capacity, tower height and location. TIM provides a navigable 3D interface, allowing the user to “fly” around the field to determine the potential glare hazard from off-target heliostats. Various heliostat aiming strategies are available for specifying how heliostats behave when in standby mode. Strategies include annulus, point-per-group, up-aiming and single-point-focus. Additionally, TIM includes an avian path feature for approximating the irradiance and feather temperature of a bird flying through the field airspace.


Empirical Glare Analysis Tool

Empirically quantify glint and glare from reflected light and assess the potential impact (e.g. temporary after-image, retinal burn). No expensive equipment required - just upload photos of the glare and the sun.

Empirical Glare Analysis

Analytical Glare Estimation Tool

Analytically predict the potential impact (e.g. temporary after-image, retinal burn) of observed glare.

PHLUX Mapping Analysis Tool

Empirically determine the irradiance distribution on a central receiver. No flux gauge needed - simply upload photos and fill in the details, and the tool does the rest.


Reflectivity Calculator Tool

Calculate the reflectivity of a receiver using only raw photos and details like location and heliostat characteristics.