A radiative transfer model (RTM) to calculate the snow brightness temperatures (Tb) is a critical element in terrestrial snow parameter retrieval from microwave remote sensing observations. The RTM simulates the Tb based on a layered snow by solving a set of microwave radiative transfer equations. Even with the same snow physical inputs to drive the RTM, currently existing models such as Microwave Emission Model of Layered Snowpacks (MEMLS), Dense Media Radiative Transfer (DMRT-QMS), and Helsinki University of Technology (HUT) models produce different Tb responses. To backwardly invert snow physical properties from the Tb, differences from RTMs are first to be quantitatively explained. To this end, this initial investigation evaluates the sources of perturbations in these RTMs, and reveals the equations where the variations are made among the three models. Modelling experiments are conducted by providing the same but gradual changes in snow physical inputs such as snow grain size, and snow density to the 3 RTMs. Simulations are conducted with the frequencies consistent with the Advanced Microwave Scanning Radiometer- E (AMSR-E) at 6.9, 10.7, 18.7, 23.8, 36.5, and 89.0 GHz. For realistic simulations, the 3 RTMs are simultaneously driven by the same snow physics model with the meteorological forcing datasets and are validated against the snow insitu samplings from the CLPX (Cold Land Processes Field Experiment) 2002-2003, and NoSREx (Nordic Snow Radar Experiment) 2009-2010.
The National Space Development Agency of Japan Advanced Microwave Scanning Radiometer (AMSR-E) was successfully launched on NASA's EOS Aqua spacecraft on May 4, 2002. This new state-of-the-art satellite radiometer will provide a wider range of frequencies and twice the spatial resolution than is currently available with the DMSP
SSM/I. New sea ice algorithms have been developed for use with the AMSR-E. The standard sea ice products to be provided include sea ice concentration at spatial resolutions of 12.5 km and 25.0 km, snow depth on sea ice at a spatial resolution of 12.5 km, and sea ice temperature at a spatial resolution of 25 km. This paper provides a summary of our plans to validate the AMSR-E sea ice products in the Arctic. The overall validation program consists of three elements:
satellite data comparisons, coordinated satellite/aircraft/surface comparisons, and a modeling and sensitivity analysis component. The first coordinated satellite/aircraft/surface Arctic campaign is planned for March 2003. A second campaign is planned for March 2005.
Conference Committee Involvement (3)
Microwave Remote Sensing of the Atmosphere and Environment VI
19 November 2008 | Noumea, New Caledonia
Microwave Remote Sensing of the Atmosphere and Environment V
15 November 2006 | Goa, India
Microwave Remote Sensing of the Atmosphere and Environment IV
9 November 2004 | Honolulu, Hawai'i, United States
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.