Title

Construction of an LED sensored sunphotometer and measurement of the atmospheric optical thickness

Date of Publication

2001

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Physics with Specialization in Computer Applications

College

College of Science

Department/Unit

Physics

Abstract/Summary

An LED (Light Emitting Diode) sensored Sunphotometer was successfully constructed and operated. The Sunphotometer is a device which determines the optical thickness of the atmosphere and of aerosols by measuring the intensity of the sunlight reaching the detector. Six LEDs were used as detectors in the constructed Sunphotometer. These LEDs also serve as the bandpass filters of the device. An LF411 operational amplifier boosted the signal output generated by the LEDs. Data are collected with the use of the Boxcar Averagers' Computer Interface Module (Model SR245) and controlled by the Data Acquisition Module. The Data Acquisition Module is a part of the software developed in this study called SpDASys. Once data has been acquired, the Data Processing Module of SpDASys computes for the different atmospheric parameters. Plots and tab-delimited files were generated for storage. Information derived from the Sunphotometer measurements can be used either to correlate measurements obtained with other platforms (such as with the LIDAR system) or provide boundary values to these platforms.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU10753

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

75 numb. leaves

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