Paper Info
Title
Converting Between SMOS and SMAP Level-1 Brightness Temperature Observations Over Nonfrozen Land
Abstract
The Soil Moisture and Ocean Salinity (SMOS) and Soil Moisture Active Passive (SMAP) missions provide Level-1 brightness temperature (Tb) observations that are used for global soil moisture estimation. However, the nature of these Tb data differs: the SMOS Tb observations contain atmospheric and select reflected extraterrestrial (“Sky”) radiation, whereas the SMAP Tb data are corrected for these contributions, using auxiliary near-surface information. Furthermore, the SMOS Tb observations are multiangular, whereas the SMAP Tb is measured at 40° incidence angle only. This letter discusses how SMOS Tb, SMAP Tb, and radiative transfer modeling components can be aligned in order to enable a seamless exchange of SMOS and SMAP Tb data in soil moisture retrieval and assimilation systems. The aggregated contribution of the atmospheric and reflected Sky radiation is, on average, about 1 K for horizontally polarized Tb and 0.5 K for vertically polarized Tb at 40° incidence angle, but local and short-term values regularly exceed 5 K.
Year
DOI
Venue
2015
10.1109/LGRS.2015.2437612
Geoscience and Remote Sensing Letters, IEEE
Keywords
Field
DocType
Atmosphere,Soil Moisture Active Passive (SMAP),Soil Moisture Ocean Salinity (SMOS),brightness temperature (Tb),galaxy,soil moisture
Assimilation (phonology),Atmosphere,Brightness temperature,Sea surface temperature,Diffuse sky radiation,Remote sensing,Atmospheric model,Sky,Atmospheric sciences,Radiative transfer,Mathematics
Journal
Volume
Issue
ISSN
PP
99
1545-598X
Citations 
PageRank 
References 
4
0.45
2
Authors
8
Name
Order
Citations
PageRank
De Lannoy, G.J.M.140.45
Reichle, R.H.240.45
Jinzheng Peng341.81
Yann Kerr413630.53
Gabrielle J. M. De Lannoy5154.15
Rita Castro640.45
Edward J. Kim75611.61
Qing Liu840.79