Results 141 to 150 of about 946 (177)
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Effect of Land-Cover Type on the SMAP Active/Passive Soil Moisture Downscaling Algorithm Performance
IEEE Geoscience and Remote Sensing Letters, 2015A brightness temperature ( $\hbox{Tb}$ ) downscaling algorithm based on the synergy between active and passive microwave observations is tested using airborne data that simulate the Soil Moisture Active Passive (SMAP) mission of the National Aeronautics and Space Administration scheduled for launch in January 2015.
Jeffrey Walker +2 more
exaly +2 more sources
The Soil Moisture Active/Passive Mission (SMAP)
IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium, 2008The Soil Moisture Active/Passive (SMAP) mission will deliver global views of soil moisture content and its freeze/thaw state that are critical terrestrial water cycle state variables. Polarized measurements obtained with a shared antenna L-band radar and radiometer system will allow accurate estimation of soil moisture at hydrometeorological scale (10 ...
Dara Entekhabi +7 more
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The Soil Moisture Active Passive (SMAP) applications activity
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011The Soil Moisture Active Passive (SMAP) mission is one of the first-tier satellite missions recommended by the U.S. National Research Council Committee on Earth Science and Applications from Space. The SMAP mission 1 is under development by NASA and is scheduled for launch late in 2014.
Molly E. Brown +5 more
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The Soil Moisture Active/Passive (SMAP) radar
2008 IEEE Radar Conference, 2008The soil moisture active/passive (SMAP) mission is a NASA mission identified by the NRC ldquodecadal surveyrdquo to measure both soil moisture and freeze/thaw state from space. The mission will use both active radar and passive radiometer instruments at L-band. In order to achieve a wide swath at sufficiently high resolution for both active and passive
Michael Spencer, Yunjin Kim, Samuel Chan
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NASA's Soil Moisture Active Passive (SMAP) observatory
2013 IEEE Aerospace Conference, 2013The Soil Moisture Active Passive (SMAP) mission, one of the first-tier missions recommended by the 2007 U.S. National Research Council Committee on Earth Science and Applications from Space, was confirmed in May 2012 by NASA to proceed into Implementation Phase (Phase C) with a planned launch in October 2014.
Kent Kellogg +8 more
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Soil Moisture Active/Passive (SMAP) Mission concept
SPIE Proceedings, 2008Soil Moisture Active/Passive (SMAP) Mission is one of the first satellites being developed by NASA in response to the National Research Council's Decadal Survey. SMAP will make global measurements of the moisture present at Earth's land surface and will distinguish frozen from thawed land surfaces. Direct observations of soil moisture and freeze/thaw
D. Entekhabi +4 more
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2010 IEEE International Geoscience and Remote Sensing Symposium, 2010
In this paper, we describe our approach to simulate realistic L-band brightness temperatures to be measured by the Soil Moisture Active Passive (SMAP) mission. These realistic simulated measurements are crucial because they provide a quantitative basis by which we develop and improve our pre-launch retrieval algorithms for soil moisture at 9-km and 36 ...
Steven Tsz K. Chan +2 more
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In this paper, we describe our approach to simulate realistic L-band brightness temperatures to be measured by the Soil Moisture Active Passive (SMAP) mission. These realistic simulated measurements are crucial because they provide a quantitative basis by which we develop and improve our pre-launch retrieval algorithms for soil moisture at 9-km and 36 ...
Steven Tsz K. Chan +2 more
openaire +1 more source
An integrated active-passive soil moisture retrieval algorithm for SMAP for bare surfaces
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012An integrated soil moisture retrieval algorithm is presented in this work wherein both radar and radiometer measurements are used simultaneously to retrieve surface soil moisture. This method is applied to bare rough surfaces with varying soil moisture and roughness distributions.
Ruzbeh Akbar, Mahta Moghaddam
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Physically-based active-passive modelling and retrieval for SMAP soil moisture inversion algorithm
2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015The NASA Soil Moisture Active Passive (SMAP) mission is designed to produce high-resolution (9 km) global mapping of surface soil moisture based on L-band radar and radiometer measurements. The multi-scale measurements are combined using time-series of active passive microwave data to retrieve the statistical regression parameters (α, β) from ...
Thomas Jagdhuber +7 more
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41st International Conference on Environmental Systems, 2011
NASA’s Earth observing Soil Moisture Active & Passive (SMAP) Mission is scheduled to launch in November 2014 into a 685 km near-polar, sun synchronous orbit. As one of the four first-tier missions recommended by the National Research Council's Committee on Earth Science and Applications from Space, SMAP will provide comprehensive global mapping ...
Arthur Mastropietro +8 more
openaire +1 more source
NASA’s Earth observing Soil Moisture Active & Passive (SMAP) Mission is scheduled to launch in November 2014 into a 685 km near-polar, sun synchronous orbit. As one of the four first-tier missions recommended by the National Research Council's Committee on Earth Science and Applications from Space, SMAP will provide comprehensive global mapping ...
Arthur Mastropietro +8 more
openaire +1 more source