Near Infrared Surveys

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Exploration Technique: Near Infrared Surveys

Exploration Technique Information
Exploration Group: Remote Sensing Techniques
Exploration Sub Group: Passive Sensors
Parent Exploration Technique: Passive Sensors
Information Provided by Technique
Lithology:
Stratigraphic/Structural:
Hydrological:
Thermal:
Cost Information
Low-End Estimate (USD): 450.0045,000 centUSD
0.45 kUSD
4.5e-4 MUSD
4.5e-7 TUSD
/ sq. mile
Median Estimate (USD): 800.0080,000 centUSD
0.8 kUSD
8.0e-4 MUSD
8.0e-7 TUSD
/ sq. mile
High-End Estimate (USD): 1,350.00135,000 centUSD
1.35 kUSD
0.00135 MUSD
1.35e-6 TUSD
/ sq. mile
Time Required
Low-End Estimate: 6 weeks0.115 years
1,008 hours
42 days
1.38 months
/ job
Median Estimate: 16 weeks0.307 years
2,688 hours
112 days
3.68 months
/ job
High-End Estimate: 30 weeks0.575 years
5,040 hours
210 days
6.899 months
/ job
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Near Infrared Surveys:
Near infrared surveys refer to multi- and hyperspectral data collected in the region just outside wavelengths detectable by the human eye. Near infrared wavelengths are generally considered to be between approximately 0.75-1.4 micrometers.
Other definitions:Wikipedia Reegle


 
Introduction
Near-infrared wavelengths behave similarly to visible light. Devices for sensing near infrared wavelengths are also known as night vision sensors. These sensors are useful in very low lighting scenes but cannot be used scenes with no light. Some animals such as nocturnal and deep sea animals have the ability to see in the near infrared spectrum.
 
Use in Geothermal Exploration
Near infrared surveys are those which measure radiation in the spectrum just outside of light visible to the human eye. The near infrared wavelengths are not usually scanned as a stand-alone survey; they are scanned along with other infrared and visible bands of the electromagnetic spectrum. By scanning multiple bands such as in multispectral and hyperspectral imaging maps showing land temperature emissivity, reflectance, and elevations can be constructed. A unique instrument that has been used for geothermal exploration activities is the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). This instrument was designed by Japan and mounted on the U.S. Terra Satellite, launched in 1999.[1] The instrument is capable of scanning in multiple bands from visible light and near infrared to long wave infrared.





 
Physical Properties
Electromagnetic spectrum: visible light, near infrared, and ultraviolet.[2]

 
Best Practices
Near infrared surveys are best conducted in conjunction with other electromagnetic bands during multispectral or hyperspectral imaging surveys.
 
Potential Pitfalls
Near infrared wavelengths as a stand-alone survey would not provide much useful information for geothermal exploration; however the near infrared spectrum can be useful to scan in conjunction with other bands.








 
References
  1. Mariana Eneva (California Energy Commission). 2010. Geothermal Exploration in Eastern California Using Aster Thermal Infrared Data. N/A: California Energy Commission. Report No.: CEC‐500‐2012‐005.
  2. University of Arizona. High Resolution Imaging Science Experiment [Internet]. 2007. [cited 2013/09/27]. Available from: http://hirise.lpl.arizona.edu/HiBlog/tag/wavelength/


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