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Assessing the Freeze/Thaw States in Arctic Circle Using FengYun-3E GNOS-R : An Initial Demonstration and Analysis

Wu, Xuerui ; Ouyang, Xinqiu ; Wu, Shengli ; Wang, Fang and Duan, Zheng LU (2024) In IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 17. p.274-281
Abstract

In this article, we present the first demonstration of the FengYun-3E (FY3E) Global Navigation Satellite System Occultation Sounder II-Reflectometry (GNOS-R) payload's capacity to detect near-surface soil freeze/thaw (F/T) states. This study offers an initial analysis of the F/T retrieval algorithm applied to data collected from the Arctic Circle, underscoring the GNOS-R's potential to deliver long-term near-surface soil F/T products. Data for the period extending from the launch day of GNOS-R (Day of Year (DOY) 179, 2021) to DOY 270 in 2022 were analyzed using the surface reflectivity (SR) ratio factor to discriminate F/T variations. Comparisons were made with soil moisture active passive (SMAP) F/T products, serving as an auxiliary... (More)

In this article, we present the first demonstration of the FengYun-3E (FY3E) Global Navigation Satellite System Occultation Sounder II-Reflectometry (GNOS-R) payload's capacity to detect near-surface soil freeze/thaw (F/T) states. This study offers an initial analysis of the F/T retrieval algorithm applied to data collected from the Arctic Circle, underscoring the GNOS-R's potential to deliver long-term near-surface soil F/T products. Data for the period extending from the launch day of GNOS-R (Day of Year (DOY) 179, 2021) to DOY 270 in 2022 were analyzed using the surface reflectivity (SR) ratio factor to discriminate F/T variations. Comparisons were made with soil moisture active passive (SMAP) F/T products, serving as an auxiliary analysis. We found a strong consistency between SR ratio factor and SMAP F/T values, with the accuracy of the F/T retrieval algorithm exceeding 60%. These findings corroborate the efficacy of the GNOS-R payload aboard FY3E in monitoring F/T patterns at higher latitudes, specifically, the Arctic Circle. The outcomes of this study will be beneficial for future F/T detection efforts using spaceborne Global Navigation Satellite System-Reflectometry payloads.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Arctic circle, freeze/thaw (F/T) retrieval, Global Navigation Satellite System Occultation Sounder II-reflectometry (GNOS-R), Global Navigation Satellite System-Reflectometry (GNSS-R), soil moisture active passive (SMAP)
in
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
volume
17
pages
8 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85179012420
ISSN
1939-1404
DOI
10.1109/JSTARS.2023.3328401
language
English
LU publication?
yes
id
a91ba10f-c7b2-4769-8eb5-197267a87287
date added to LUP
2024-01-31 11:55:54
date last changed
2024-01-31 11:58:01
@article{a91ba10f-c7b2-4769-8eb5-197267a87287,
  abstract     = {{<p>In this article, we present the first demonstration of the FengYun-3E (FY3E) Global Navigation Satellite System Occultation Sounder II-Reflectometry (GNOS-R) payload's capacity to detect near-surface soil freeze/thaw (F/T) states. This study offers an initial analysis of the F/T retrieval algorithm applied to data collected from the Arctic Circle, underscoring the GNOS-R's potential to deliver long-term near-surface soil F/T products. Data for the period extending from the launch day of GNOS-R (Day of Year (DOY) 179, 2021) to DOY 270 in 2022 were analyzed using the surface reflectivity (SR) ratio factor to discriminate F/T variations. Comparisons were made with soil moisture active passive (SMAP) F/T products, serving as an auxiliary analysis. We found a strong consistency between SR ratio factor and SMAP F/T values, with the accuracy of the F/T retrieval algorithm exceeding 60%. These findings corroborate the efficacy of the GNOS-R payload aboard FY3E in monitoring F/T patterns at higher latitudes, specifically, the Arctic Circle. The outcomes of this study will be beneficial for future F/T detection efforts using spaceborne Global Navigation Satellite System-Reflectometry payloads.</p>}},
  author       = {{Wu, Xuerui and Ouyang, Xinqiu and Wu, Shengli and Wang, Fang and Duan, Zheng}},
  issn         = {{1939-1404}},
  keywords     = {{Arctic circle; freeze/thaw (F/T) retrieval; Global Navigation Satellite System Occultation Sounder II-reflectometry (GNOS-R); Global Navigation Satellite System-Reflectometry (GNSS-R); soil moisture active passive (SMAP)}},
  language     = {{eng}},
  pages        = {{274--281}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing}},
  title        = {{Assessing the Freeze/Thaw States in Arctic Circle Using FengYun-3E GNOS-R : An Initial Demonstration and Analysis}},
  url          = {{http://dx.doi.org/10.1109/JSTARS.2023.3328401}},
  doi          = {{10.1109/JSTARS.2023.3328401}},
  volume       = {{17}},
  year         = {{2024}},
}