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Long-range radiometer measurements with a close-range reference.

R G Driggers, C E Halford, R G Deep

|September 22, 2010

Summary

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This study introduces a correction procedure to improve radiometer accuracy for atmospheric transmission measurements. The method accounts for key factors, enhancing the reliability of remote blackbody calibration techniques.

Area of Science:

Radiometry
Atmospheric physics
Optical engineering

Background:

Accurate atmospheric transmission measurements are crucial for various applications.
Radiometers are commonly used for these measurements, but face accuracy limitations.
Field calibration using blackbody sources is a standard practice.

Purpose of the Study:

To develop and validate a correction procedure for radiometer-based transmission measurements.
To identify and quantify factors limiting the accuracy of remote blackbody calibration.
To enhance the precision of atmospheric attenuation measurements.

Main Methods:

A correction procedure was developed for radiometer transmission measurements.
Field calibration involved presenting a blackbody source at close range.

Related Experiment Videos

Atmospheric attenuation was measured by observing a distant blackbody source.

Main Results:

Three primary factors limiting measurement accuracy were identified.
A theoretical correction factor was derived based on these factors.
Experimental measurements showed excellent agreement with the derived theoretical correction factor.

Conclusions:

The developed correction procedure significantly improves radiometer accuracy for transmission measurements.
The identified factors are the major contributors to inaccuracies in this technique.
The findings validate the theoretical model and its application in atmospheric studies.