A Brightness Temperature Reconstruction Method for Mirrored Aperture Synthesis Based on Truncated Singular Values

Yuanchao WU; Rongchuan LÜ; Haofeng DOU; Yi’nan LI; Hao LI; Hailiang LU; Feng LUO; Qingxia LI

doi:10.11999/JEIT190886

Volume 43 Issue 2

Feb. 2021

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Article Navigation > Journal of Electronics & Information Technology > 2021 > 43(2): 495-500

Yuanchao WU, Rongchuan LÜ, Haofeng DOU, Yi’nan LI, Hao LI, Hailiang LU, Feng LUO, Qingxia LI. A Brightness Temperature Reconstruction Method for Mirrored Aperture Synthesis Based on Truncated Singular Values[J]. Journal of Electronics & Information Technology, 2021, 43(2): 495-500. doi: 10.11999/JEIT190886

Citation:

Yuanchao WU, Rongchuan LÜ, Haofeng DOU, Yi’nan LI, Hao LI, Hailiang LU, Feng LUO, Qingxia LI. A Brightness Temperature Reconstruction Method for Mirrored Aperture Synthesis Based on Truncated Singular Values[J]. Journal of Electronics & Information Technology, 2021, 43(2): 495-500. doi: 10.11999/JEIT190886

Citation:

Yuanchao WU, Rongchuan LÜ, Haofeng DOU, Yi’nan LI, Hao LI, Hailiang LU, Feng LUO, Qingxia LI. A Brightness Temperature Reconstruction Method for Mirrored Aperture Synthesis Based on Truncated Singular Values[J]. Journal of Electronics & Information Technology, 2021, 43(2): 495-500. doi: 10.11999/JEIT190886

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A Brightness Temperature Reconstruction Method for Mirrored Aperture Synthesis Based on Truncated Singular Values

doi: 10.11999/JEIT190886

1.
China Academy of Space Technology(Xi an), Xi’an 710000, China
2.
National Laboratory of Rader Signal Processing, Xidian University, Xi’an 710071, China
3.
School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan 430074, China

Funds: The National Natural Science Foundation of China (41706204), The Qian Xuesen Young Innovation Foundation (QXSCXJJ2017-504), The Independent Investigate Project of Xi’an Institute of China Academy of Space Technology (Y17-KJCX-04)

Received Date: 2020-11-05
Rev Recd Date: 2020-06-04

Available Online: 2020-07-18

Publish Date: 2021-02-23

Abstract

Abstract

Image reconstruction for Mirrored Aperture Synthesis(MAS) radiometer is an image inversion process from cosine visibility function to brightness temperature, and the cosine visibility function is solved by the transformation equation. However, the transformation equation is ill-conditioned equation, and a small error in the correlation output causes a big deviation in the cosine visibility function. Therefore, the solution of the ill-conditioned equations is the key to the success of the brightness temperature reconstruction algorithm. Based on the basic principle of MAS, the ill-conditioned transformation matrix is analyzed, and the truncated singular value decomposition is applied to the solution of the transformation equation for MAS. Simulation and experiment show that this method can effectively reduce noise and improve image quality.
- Mirrored Aperture Synthesis(MAS),
- Truncated singular values,
- Brightness temperature reconstruction

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References(19)

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