ERS-1 Radar Interferometry Over Sea Ice
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Monitoring Freeze-thaw transitions of the soil and vegetation in high latitude terestrial ecosystems is useful for determining the length of the growing season, and for monitoring potential damage to living plants due to frezing and frost drought.
The scatterometer is an active radar radiating at the C-band frequency.
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Satellite-borne wind scatterometers are effective tools for monitoring ice sheets and microwave imaging techniques enable comparison of historic and contemporary scatterometer data in climate change studies.
Report will be submitted to the State of Nevada.
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Rare earth elements (REEs) are essential to society given their prevalence in many modern technologies. Quantitative elemental analysis of REEs is therefore a critical capability. Calibration free–laser-induced breakdown spectroscopy (CF-LIBS) is a rapidly maturing and promising approach to quantitative elemental analysis with many attractive qualities. The application of CF-LIBS to analyzing samples containing the REEs is hindered by a lack of fundamental data, specifically transition probabilities (TPs). As such, this study seeks to help address this knowledge deficiency by reporting 967 previously unreported TPs for 13 REEs (lanthanum, cerium, praseodymium, neodymium, samarium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium). The method developed in this study to estimate the TPs requires small amounts of material (a few nanograms) compared with other approaches (~ milligrams), uses non-specialized equipment, and does not involve complicated sample preparations.
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