## 7 Conclusions
(2017)_ [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] Calibration of the Water Cloud Model at C-Band for Winter Crop Fields and grasslands. _Remote Sens._**2017**, \(9\), 969. [CrossRef]
* [PERSON] et al. (2016) [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Soil moisture retrieval over irrigated grassland using X-band SAR data. _Remote Sens. Environ._**2016**, _176_, 202-218. [CrossRef]
* _[PERSON] et al. (2014)_ [PERSON]; [PERSON]; [PERSON] A Synergistic Methodology for Soil Moisture Estimation in an Alpine Prairie Using Radar and Optical Satellite Data. _Remote Sens._**2014**, \(6\), 10966-10985. [CrossRef]
* _[PERSON] et al. (2011)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] Soil moisture retrieval over agricultural fields from multi-polarized and multi-angular RADARSAT-2 SAR data. _Remote Sens. Environ._**2011**, _115_, 33-43. [CrossRef]
* _[PERSON] et al. (2015)_ [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON] Coupling SAR C-Band and Optical Data for Soil Moisture and Leaf Area Index Retrieval Over Irrigated Grasslands. _IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens._**2015**, \(9\), 1229-1243. [CrossRef]
* _[PERSON] et al. (2001)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] A semi-empirical backscattering model at L-band and C-band for a soybean canopy with soil moisture inversion. _IEEE Trans. Geosci. Remote Sens._**2001**, _39_, 864-872. [CrossRef]
* _[PERSON] et al. (1993)_ [PERSON]; [PERSON]; [PERSON] Estimating surface soil moisture and leaf area index of a wheat canopy using a dual-frequency (C and X bands) scatterometer. _Remote Sens. Environ._**1993**, _46_, 331-339. [CrossRef]
* _[PERSON] et al. (2011)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Soil surface moisture estimation over a semi-arid region using ENVISAT ASAR radar data for soil evaporation evaluation. _Hydrol. Earth Syst. Sci._**2011**, _15_. [CrossRef]
* _[PERSON] et al. (2010)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] The SMOS mission: New tool for monitoring key elements ofthe global water cycle. _Proc. IEEE_**2010**, _98_, 666-687. [CrossRef]
* _[PERSON] et al. (2003)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Soil moisture retrieval from AMSR-E. _IEEE Trans. Geosci. Remote Sens._**2003**, _41_, 215-229. [CrossRef]
* _[PERSON] et al. (2014)_ [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] Soil moisture mapping in a semiarid region, based on ASAR/Wide Swath satellite data. _Water Resour. Res._**2014**, _50_, 823-835. [CrossRef]
* _[PERSON] et al. (2012)_ [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]. Accounting for seasonality in a soil moisture change detection algorithm for ASAR Wide Swath time series. _Hydrol. Earth Syst. Sci._**2012**, _16_, 773-786. [CrossRef]
* _[PERSON] et al. (2008)_ [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Temporal stability of soil moisture and radar backscatter observed by the Advanced Synthetic Aperture Radar (ASAR). _Sensors_**2008**, \(8\), 1174-1197. [CrossRef] [PubMed]
* _[PERSON] et al. (2017)_ [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] The optical trapezoid model: A novel approach to remote sensing of soil moisture applied to Sentinel-2 and Landsat-8 observations. _Remote Sens. Environ._**2017**, _198_, 52-68. [CrossRef]* _[PERSON] et al. (2002)_ [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] On current limits of soil moisture retrieval from ERS-SAR data. _IEEE Trans. Geosci. Remote Sens._**2002**, _40_, 2438-2447. [CrossRef]
* _[PERSON] et al. (2012)_ [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] A potential use for the C-band polarimetric SAR parameters to characterize the soil surface over bare agriculture fields. _IEEE Trans. Geosci. Remote Sens._**2012**, _50_, 3844-3858.