Effects of Arctic Wetland Dynamics on Tower-Based GNSS Reflectometry Observations

Steiner, Ladina; Fabra, Fran; Rautiainen, Kimmo; Lemmetyinen, Juha; Cohen, Juval; Cardellach, Estel

doi:10.1109/tgrs.2021.3129604

Cited by 3 publications

(2 citation statements)

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“…Previous F/T studies have been performed using GNSS-R [16][17][18][19][20][21]. Several power Delay Doppler Maps (DDM) parameters were derived from different satellite products, including Soil Moisture Active Passive (SMAP) [16], TechDemoSat-1 [17], and CYGNSS [18].…”

Section: Introductionmentioning

confidence: 99%

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Mapping Freezing and Thawing Surface State Periods With the CYGNSS Based F/T Seasonal Threshold Algorithm

Carreño-Luengo

Ruf

2022

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Freeze/Thaw (F/T) surface state detection and imaging has been demonstrated as a capability of NASA's Cyclone Global Navigation Satellite System (CYGNSS) mission. The objective of the research presented here is the application of an existing F/T retrieval algorithm to multiple target areas over several years in order to demonstrate the ability to provide long term trending of F/T behavior. Metrics are developed and evaluated to characterize F/T trends related to global warming. They include the annual fraction of time spent frozen and thawed as a function of location and year, and the earliest Fall freeze and earliest Spring thaw as a function of location and year. The results demonstrate the capability of Global Navigation Satellite Systems Reflectometry (GNSS-R) to provide long term trending of F/T behavior relevant to studies of climate change.

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Section: Introductionmentioning

confidence: 99%

“…Results showed a promising sensitivity to F/T seasonal changes. A dual-pol (H,V) ground-based study was also performed [21], showing a strong correlation with Sentinel-1 backscatter coefficient. Additionally, retrieval methods have been presented using CYGNSS [19] and TechDemoSat-1 data [20].…”

Section: Introductionmentioning

confidence: 99%