Engineering topics
Publications and source records attributed to Tang, W..
We compare here the air-sea exchange coefficient for C02 estimated with monthly mean wind speed measured by the Special Sensing Microwave Imager (SSM/I), Ks , and by the scatterometer QuikSCAT, Kq, for the year 2000.
preliminary results will be shown to demonstrate the application of spacebased IMT and fresh water flux in ocean-atmosphere-land interaction studies, such as the hydrologica balance on Amazon rainfall and Indian monsoon.
Talks about how spaceborne scatterometers are the only proven mean to measure ocean surface wind vector.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
The series of joint U.S.-Japan spaceborne scatterometers missions to provide continuous measurements of ocean wind vectors is reviewed. Examples of the scientific impact of the continuous effort in improving spatial resolution and coverage are provided. The plan for the future is reviewed.
Explore the source record for details and available documents.
The influence of ocean on the continental rainfall, in seasonal and intraseasonal scales were examined. A method has been developed and validated to estimate IWT from the product of SWV and IWV.
The Tropical Rain Measuring Mission (TRMM) provides the opportunity to improve the spacebased estimation of evaporation. An algorithm for retrieving evaporation directly from the radiances observed by the TRMM Microwave Imager and its validation results are described.
Nuclear Magnetic resonance (NMR) is a well-known spectroscopic technique used by chemists and is especially powerful in detecting the presence of water and distinguishing between arbitrary physisorbed and chemisorbed states. This ability is of particular importance in the search for extra-terrestrial life on planets such as Mars.
Explore the source record for details and available documents.
A series of partial penetration Variable Polarity Plasma Arc welds were made at equal power but various combinations of current and voltage on 2219 aluminum. Arc Efficiency was measured calorimetrically and ranged between 48% and 66%. Melting efficiency depends on the weld pool shape. Increased current increases the melting efficiency as it increases the depth to width ratio of the weld pool. Higher currents are thought to raise arc pressure and depress the liquid at the bottom of the weld pool causing a more nearly two dimensional heat flow condition.
The history of China has been swayed by winds over the Western Pacific.
Daily NASA Scatterometer (NSCAT) wind estimates cover about 75% of the globe.
We report on the development of silicon micro valves for micro-propulsion and other space applications here at JPL.
Explore the source record for details and available documents.
Explore the source record for details and available documents.