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https://hdl.handle.net/11681/32392| Title: | Terrain Analysis by Electromagnetic Means. Report 4, Laboratory Investigation of the Infrared Emissivity of Soils below a Wavelength of 7.7 Microns |
| Authors: | Lavecchia, Nicholas J. Williamson, Albert N. Nikodem, H. J. (Hansjoerg J.) Mobility and Environmental Systems Laboratory (U.S.) |
| Keywords: | Infrared radiation--Military applications Trafficability Soil temperature Soil moisture |
| Publisher: | U.S. Army Engineer Waterways Experiment Station |
| Series/Report no.: | Technical Report (U.S. Army Engineer Waterways Experiment Station);no. 3-693 rept.4 |
| Abstract: | This report presents the results of test using a passive infrared scanning system responsive to radiation below approximately 7,7 micron to determine if a correlation could be found between the infrared emicsivity of soils and their trafficability parameters. It wac established that a relation between the passive emission of soils and soil surface moisture content can be measured, but contributing factors other than soil emissivity were encountered. These factors were soil surface temperature and incident radiation on the soil surface. These factors so influenced the magnitude of the net detected energy that this measurement is meaningless, in terms of soil emissivity, unless the contribution of the other factors is known. Progressive modifications in measuring techniques were made in an attempt to isolate these components. The data indicate that the information that can be obtained from a passive infrared sensor using the technique derived herein is not sufficient to determine emissivity values of terrain with sufficient accuracy for practical application. |
| Description: | Technical Report |
| Gov't Doc #: | Technical Report No. 3-693 Report 4 |
| Rights: | Approved for public release; distribution is unlimited |
| URI: | https://hdl.handle.net/11681/32392 |
| Size: | 82 pages / 7.448Mb |
| Types of Materials: | PDF/A |
| Appears in Collections: | Technical Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Technical Report No 3-693 Rept 4.pdf | 7.63 MB | Adobe PDF |  View/Open |