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Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer

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Published on: May 29, 2019

Aerosol optical depth determination from ground based irradiance ratios.

N T O'Neill, A Royer, J R Miller

|June 18, 2010

Summary

This study introduces a new method to measure aerosol optical depth using total and direct irradiance ratios. This technique offers accurate atmospheric optical depth measurements, serving as a valuable alternative to traditional sunphotometer methods.

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Area of Science:

Atmospheric Science
Remote Sensing
Meteorology

Background:

Atmospheric optical depth is crucial for remote sensing and meteorological applications.
Current measurement methods, like sunphotometry, are sensitive to instrument calibration accuracy.

Purpose of the Study:

To present a novel, simple technique for extracting aerosol optical depth.
To provide an accurate and accessible alternative to existing measurement methods.

Main Methods:

Utilizing the ratio of total to direct irradiance measurements.
Performing error analysis on radiative transfer simulations and field measurements.

Main Results:

The proposed technique successfully extracts aerosol optical depth.
Error analysis confirms the accuracy of the generated aerosol optical depth values for various applications.

Conclusions:

The developed method provides sufficiently accurate aerosol optical depth.
This technique is a practical and valuable alternative to standard sunphotometer measurements.