Julián Chaubell

Consistent Soil Moisture and Vegetation Optical Depth from Relatively Calibrated SMOS Brightness Temperatures with SMAP

Julián Chaubell

The Soil Moisture Active Passive mission (SMAP, since 2015) from The National Aeronautics and Space Administration’s (NASA) and Soil Moisture and Ocean Salinity mission (SMOS, since 2009) from The European Space Agency’s (ESA) measure polarimetric brightness temperature (TB) at L-band (1.4 GHz). …

Interferometric Coherence Modeling of Radar and Reflectometer Observations Related to the Temporal and Spatial Variabilities of Snow Depth and Rough Surface

Simon H Yueh, Xiaolan Xu, Tianlin Wang, Julián Chaubell

us (code pays fourni par la source)

A Review of Interferometric Synthetic Aperture Radar (InSAR) and Phase-Based Techniques for Monitoring Seasonal Snow

Jack Tarricone, Ross T. Palomaki, Randall Bonnell, Zachary Hoppinen et autres

Radar phase-based techniques for measuring snow water equivalent (SWE) and snow depth, such as Interferometric Synthetic Aperture Radar (InSAR), have advanced substantially over the past 25 years. Progress has been made across a wide range of frequencies (P-, L-, C-, X-, and …

us, fi, Afrique du Sud (code pays fourni par la source)

Spatio-temporal dynamics of L-band zeroth-order vegetation scattering albedo from SMAP observations in tropical forests

Yuqing Liu, Xiaojun Li, Philippe Ciais, Frédéric Frappart et autres

fr, cn, pe, us (code pays fourni par la source)

Phase stable instrument development for P-band signals of opportunity synthetic aperture radar

Rashmi Shah, Justin H. Nguyen, Jacob Gorelik, Devin Cody et autres

This paper describes the development of a reflectometry instrument for P-band Signals of Opportunity Synthetic Aperture Radar. The instrument uses common clock to down-sample all the signal chain. It also uses a common noise source to calibrate relative phase. With this design, …

us (code pays fourni par la source)

Impact of L-band Vegetation Optical Depth Temporal Variation on Soil Moisture Retrieval

Andreas Colliander, Michael H. Cosh, Simon Kraatz, Laura L. Bourgeau-Chavez et autres

Forests are one of the most essential components of the Earth system. They account for a large part of the total global photosynthetic activity, store a significant amount of the total carbon, and provide a habitat for countless species. At the same …

us, ca, it (code pays fourni par la source)

Coherence Modeling of Land Cover Observations from Repeat Pass Interferometric Synthetic Aperture Radar

Simon H Yueh, Xiaolan Xu, Tianlin Wang, Julián Chaubell

The phase change of repeat-pass Interferometric Synthetic Aperture Radar (InSAR) observations has found applications to monitoring of surface deformation, forest biomass, soil moisture and snow water equivalent. The InSAR phase measurement accuracy depends on the interferometric coherence of radar signals from repeat …

us (code pays fourni par la source)

Interferometric Coherence of Bistatic Radar Observations and Spatial Resolution

Simon H Yueh, Xiaolan Xu, Tianlin Wang, Julián Chaubell

The coherence of Interferometric Synthetic Aperture Radar (InSAR) observations has many applications, including monitoring of surface topography changes, soil moisture, forest biomass and snow water equivalent. The InSAR phase measurement accuracy depends on the interferometric coherence of radar signals from two repeat …

us (code pays fourni par la source)

Performance of SMOS Soil Moisture Products Over Core Validation Sites

Andreas Colliander, Yann H. Kerr, Jean‐Pierre Wigneron, Amen Al‐Yaari et autres

The European Space Agency (ESA) launched the SMOS (Soil Moisture Ocean Salinity) mission in 2009; currently, multiple global soil moisture (SM) products are based on the measurements of its L-band (1.4 GHz) radiometer. We compared four SMOS products with each other: Level …

us, fr, jp, ca, es, nl, ar, au (code pays fourni par la source)

Assessment of Surface Fractional Water Impacts on SMAP Soil Moisture Retrieval

Jinyang Du, John S. Kimball, S. Chan, Julián Chaubell et autres

Fractional water (FW) correction of satellite microwave brightness temperature (Tb) observations is a prerequisite for accurate soil moisture (SM) mapping over mixed land and water areas. Here, we evaluated the FW impacts on NASA Soil Moisture Active Passive (SMAP) L-band (1.4 GHz) …

us (code pays fourni par la source)

P-band Signals of Opportunity Remote Sensing of Mountainous Snowpack

Simon H Yueh, Rashmi Shah, Javier Bosch-Lluis, Julián Chaubell et autres

us (code pays fourni par la source)

Development of SMAP Retrievals for Forested Regions: SMAPVEX19-22 and SMAPVEX22-Boreal

Andreas Colliander, Michael H. Cosh, Aaron A. van den Berg, Sidharth Misra et autres

The retrieval of soil moisture (SM) under forest canopy has long been an important goal for low frequency remote sensing. The NASA Soil Moisture Active Passive (SMAP) mission is engaged at three separate experiment sites to improve its SM retrieval algorithm in …

us, ca (code pays fourni par la source)