Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/641113
Title: An Effective Emission Depth Model for Passive Microwave Remote Sensing
Authors: Fang-Cheng Zhou;Xiaoning Song;Pei Leng;Zhao-Liang Li
subject: soil moisture content|passive microwaves|Center frequency of the radiometer|penetration and effective emission depth model|noise-equivalent differential temperature
Year: 2016
Publisher: IEEE
Abstract: Knowing the exact penetration depth for passive microwave will enable us to gain a better understanding of the characteristics of the targets. But now, there is only a penetration depth model that can calculate the specific depth while it is suitable for active microwaves. However, due to the completely different working mechanisms, the penetration depth model is most likely limited when applying to passive microwaves. Therefore, an effective emission depth model for passive microwaves was first proposed based on the radiative transfer theory, assuming that a homogenous double-layer (soil and atmosphere) medium exists between the passive microwave radiometer and a certain soil depth. With simulated data from the advanced integral equation model (AIEM) and subsequent analysis, the effective emission depth model was further simplified to make it more practical with a root-mean-squared error (RMSE) of 0.46 cm and a bias of 0.032 cm. For the simplified model, only the soil moisture content and the noise-equivalent differential temperature and center frequency of the radiometer are required. By comparing the penetration depth model and simplified effective emission depth model, a certain soil moisture content that makes both the models reveal the same results is found.
URI: http://localhost/handle/Hannan/175315
http://localhost/handle/Hannan/641113
ISSN: 1939-1404
2151-1535
volume: 9
issue: 4
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7416134.pdf1.01 MBAdobe PDFThumbnail
Preview File
Title: An Effective Emission Depth Model for Passive Microwave Remote Sensing
Authors: Fang-Cheng Zhou;Xiaoning Song;Pei Leng;Zhao-Liang Li
subject: soil moisture content|passive microwaves|Center frequency of the radiometer|penetration and effective emission depth model|noise-equivalent differential temperature
Year: 2016
Publisher: IEEE
Abstract: Knowing the exact penetration depth for passive microwave will enable us to gain a better understanding of the characteristics of the targets. But now, there is only a penetration depth model that can calculate the specific depth while it is suitable for active microwaves. However, due to the completely different working mechanisms, the penetration depth model is most likely limited when applying to passive microwaves. Therefore, an effective emission depth model for passive microwaves was first proposed based on the radiative transfer theory, assuming that a homogenous double-layer (soil and atmosphere) medium exists between the passive microwave radiometer and a certain soil depth. With simulated data from the advanced integral equation model (AIEM) and subsequent analysis, the effective emission depth model was further simplified to make it more practical with a root-mean-squared error (RMSE) of 0.46 cm and a bias of 0.032 cm. For the simplified model, only the soil moisture content and the noise-equivalent differential temperature and center frequency of the radiometer are required. By comparing the penetration depth model and simplified effective emission depth model, a certain soil moisture content that makes both the models reveal the same results is found.
URI: http://localhost/handle/Hannan/175315
http://localhost/handle/Hannan/641113
ISSN: 1939-1404
2151-1535
volume: 9
issue: 4
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7416134.pdf1.01 MBAdobe PDFThumbnail
Preview File
Title: An Effective Emission Depth Model for Passive Microwave Remote Sensing
Authors: Fang-Cheng Zhou;Xiaoning Song;Pei Leng;Zhao-Liang Li
subject: soil moisture content|passive microwaves|Center frequency of the radiometer|penetration and effective emission depth model|noise-equivalent differential temperature
Year: 2016
Publisher: IEEE
Abstract: Knowing the exact penetration depth for passive microwave will enable us to gain a better understanding of the characteristics of the targets. But now, there is only a penetration depth model that can calculate the specific depth while it is suitable for active microwaves. However, due to the completely different working mechanisms, the penetration depth model is most likely limited when applying to passive microwaves. Therefore, an effective emission depth model for passive microwaves was first proposed based on the radiative transfer theory, assuming that a homogenous double-layer (soil and atmosphere) medium exists between the passive microwave radiometer and a certain soil depth. With simulated data from the advanced integral equation model (AIEM) and subsequent analysis, the effective emission depth model was further simplified to make it more practical with a root-mean-squared error (RMSE) of 0.46 cm and a bias of 0.032 cm. For the simplified model, only the soil moisture content and the noise-equivalent differential temperature and center frequency of the radiometer are required. By comparing the penetration depth model and simplified effective emission depth model, a certain soil moisture content that makes both the models reveal the same results is found.
URI: http://localhost/handle/Hannan/175315
http://localhost/handle/Hannan/641113
ISSN: 1939-1404
2151-1535
volume: 9
issue: 4
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7416134.pdf1.01 MBAdobe PDFThumbnail
Preview File