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Optimum wavelength intervals for surface temperature radiometry.

¹Goddard Space Flight Center, Greenbelt,Maryland, USA.

|January 6, 2010

Summary

This summary is machine-generated.

Radiometric temperature measurements of planetary surfaces can be inaccurate due to mineral reflectance variations. The 10-12 micrometer range offers the most uniform mineral emissivity for accurate remote sensing.

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Area of Science:

Planetary Science
Remote Sensing
Mineralogy

Background:

Radiometric measurements are crucial for determining planetary surface temperatures.
Surface mineral properties, specifically reflectance and emissivity, can significantly impact temperature readings.
Existing radiometric methods may be susceptible to errors caused by variations in mineral emissivity.

Purpose of the Study:

To investigate the spectral reflectance of common surface minerals.
To identify wavelength intervals prone to significant emissivity variations.
To determine the optimal wavelength range for accurate radiometric temperature measurements of planetary surfaces.

Main Methods:

Total reflectance measurements were conducted on common surface minerals.
Measurements spanned the wavelength interval from 0.5 to 23 micrometers.
Analysis focused on identifying reflection maxima and corresponding emissivity variations.

Main Results:

Pronounced reflection maxima were observed in specific wavelength regions used for radiometric measurements.
These reflection maxima indicate potential for significant emissivity variations.
The 10-12 micrometer interval showed the most uniform mineral emissivity.

Conclusions:

Variations in mineral reflectance and emissivity can introduce substantial errors in planetary surface temperature measurements.
The 10-12 micrometer wavelength interval is recommended for radiometric measurements due to uniform mineral emissivity.
Restricting measurements to Earth's atmospheric windows, specifically the 10-12 micrometer band, enhances measurement accuracy.