干旱区生态环境知识资源中心(Arid): Simultaneous Retrieval of Surface Roughness Parameters for Bare Soils From Combined ActivePassive Microwave SMAP Observations

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DOI	10.1109/TGRS.2020.3035204
	Simultaneous Retrieval of Surface Roughness Parameters for Bare Soils From Combined ActivePassive Microwave SMAP Observations
	Fluhrer, Anke; Jagdhuber, Thomas; Akbar, Ruzbeh; O'Neill, Peggy E.; Entekhabi, Dara
通讯作者	Fluhrer, A (corresponding author), German Aerosp Ctr, Microwaves & Radar Inst, Muenchener Str 20, D-82234 Wessling, Germany.
来源期刊	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
ISSN	0196-2892
EISSN	1558-0644
出版年	2021
卷号	59 期号:10 页码:8182-8194
英文摘要	An active-passive microwave retrieval algorithm for simultaneous determination of soil surface roughness parameters [vertical root-mean-square (RMS) height (s) and horizontal correlation length (l)] is presented for bare soils. The algorithm is based on active-passive microwave covariation, including the improved Integral Equation Method ((IEM)-E-2), and is tested with global soil moisture active passive (SMAP) observations. The estimated retrieval results for s and l are overall consistent with values in the literature, indicating the validity of the proposed algorithm. Sensitivity analyses showed that the developed roughness retrieval algorithm is independent of permittivity for epsilon(s) > 10 [-]. Furthermore, the physical model basis of this approach ((IEM)-E-2) allows the application of different autocorrelation functions (ACF), such as Gaussian and exponential ACFs. Global roughness retrieval results confirm bare areas in deserts such as Sahara or Gobi. However, the type of ACF used within roughness parameter estimation is important. Retrieval results for the Gaussian ACF describe a rougher surface than retrieval results for the exponential ACF. No correlations were found between roughness results and the amount of precipitation or the soil texture, which could be due to the coarse spatial resolution of the SMAP data. The extension of this approach to vegetated soils is planned as an add-on study.
英文关键词	Correlation length (IEM)-E-2 radar radiometer root-mean-square (RMS) height soil moisture active passive (SMAP)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000698968700017
WOS关键词	MOISTURE RETRIEVAL ; COMBINED RADAR ; MODEL ; EMISSION ; SCATTERING ; RADIOMETER ; CALIBRATION ; AQUARIUS ; SENSOR ; FIELD
WOS类目	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363569
作者单位	[Fluhrer, Anke; Jagdhuber, Thomas] German Aerosp Ctr, Microwaves & Radar Inst, Muenchener Str 20, D-82234 Wessling, Germany; [Fluhrer, Anke] Univ Augsburg, Inst Geog, Alter Postweg 118, D-86159 Augsburg, Germany; [Akbar, Ruzbeh; Entekhabi, Dara] MIT, Dept Civil & Environm Engn, Cambridge, MA 02139 USA; [O'Neill, Peggy E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
推荐引用方式 GB/T 7714	Fluhrer, Anke,Jagdhuber, Thomas,Akbar, Ruzbeh,et al. Simultaneous Retrieval of Surface Roughness Parameters for Bare Soils From Combined ActivePassive Microwave SMAP Observations[J],2021,59(10):8182-8194.
APA	Fluhrer, Anke,Jagdhuber, Thomas,Akbar, Ruzbeh,O'Neill, Peggy E.,&Entekhabi, Dara.(2021).Simultaneous Retrieval of Surface Roughness Parameters for Bare Soils From Combined ActivePassive Microwave SMAP Observations.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,59(10),8182-8194.
MLA	Fluhrer, Anke,et al."Simultaneous Retrieval of Surface Roughness Parameters for Bare Soils From Combined ActivePassive Microwave SMAP Observations".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 59.10(2021):8182-8194.