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Article

Retrieval of Cloud Liquid Water Using Microwave Signals from LEO Satellites: A Feasibility Study through Simulations

1
Department of Electrical, Electronic and Computer Engineering, The University of Western Australia, Perth 6009, Australia
2
NCAR Earth System Laboratory, P.O. Box 3000, Boulder, CO 80307, USA
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(5), 460; https://doi.org/10.3390/atmos11050460
Received: 23 March 2020 / Revised: 28 April 2020 / Accepted: 30 April 2020 / Published: 2 May 2020
(This article belongs to the Special Issue Atmospheric Applications in Microwave Radiometry)
A novel approach, using low Earth orbit (LEO) satellite microwave communication links for cloud liquid water measurements, is proposed in this paper. The feasibility of this approach is studied through simulations of the retrieval system including a LEO satellite communicating with a group of ground receivers equipped with signal-to-noise ratio (SNR) estimators, a synthetic cloud attenuation field and a tomographic retrieval algorithm. Rectangular and Gaussian basis functions are considered to define the targeted field. Simulation results suggest that the proposed least-squares based retrieval algorithm produces satisfactory outcomes for both types of basis functions. The root-mean-square error of the retrieved field is around 0.2 dB/km, with the range of the reference field as 0 to 2.35 dB/km. It is also confirmed that the partial retrieval of the cloud field is achievable when a limited number of receivers with restricted locations are available. The retrieval outcomes exhibit properties of high resolution and low error, indicating that the proposed approach has great potential for cloud observations. View Full-Text
Keywords: cloud measurement; low Earth orbit (LEO) satellite; satellite communication; tomography; signal-to-noise ratio cloud measurement; low Earth orbit (LEO) satellite; satellite communication; tomography; signal-to-noise ratio
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MDPI and ACS Style

Shen, X.; Huang, D.D.; Wang, W.; Prein, A.F.; Togneri, R. Retrieval of Cloud Liquid Water Using Microwave Signals from LEO Satellites: A Feasibility Study through Simulations. Atmosphere 2020, 11, 460. https://doi.org/10.3390/atmos11050460

AMA Style

Shen X, Huang DD, Wang W, Prein AF, Togneri R. Retrieval of Cloud Liquid Water Using Microwave Signals from LEO Satellites: A Feasibility Study through Simulations. Atmosphere. 2020; 11(5):460. https://doi.org/10.3390/atmos11050460

Chicago/Turabian Style

Shen, Xi, Defeng D. Huang, Wenxiao Wang, Andreas F. Prein, and Roberto Togneri. 2020. "Retrieval of Cloud Liquid Water Using Microwave Signals from LEO Satellites: A Feasibility Study through Simulations" Atmosphere 11, no. 5: 460. https://doi.org/10.3390/atmos11050460

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