Joint Retrieval of Soil Moisture and Permafrost Active Layer Thickness Using L-Band Insar and P-Band Polsar

Permafrost Dynamics Observatory—Part I: Postprocessing and Calibration Methods of UAVSAR L‐Band InSAR Data for Seasonal Subsidence Estimation

“…For further details of the PDO joint retrieval algorithm, we refer readers to Chen et al. ( 2021 , In press).…”

“…All P‐band and L‐band data analyzed in this paper and in (Chen et al., 2021 ) are made available by NASA/JPL UAVSAR ( https://uavsar.jpl.nasa.gov/ ). While the L‐band UAVSAR has a native resolution of 1.67 and 0.6 m in range and azimuth respectively, InSAR pair products are provided at a 5 m by 7.2 m (range/azimuth) spatial resolution.…”

“…In this study, we present several calibration methods which were developed for the L‐band InSAR data used in the PDO algorithm. Part II describes in detail the PDO algorithm and associated data processing techniques (Chen et al., 2021 , submitted to this special issue).…”

Potential Satellite Monitoring of Surface Organic Soil Properties in Arctic Tundra From SMAP

“…(2020), to characterize the SOM distribution along the soil vertical profile: $$$\text{SOM}(z)={\text{SOM}}_{0}+\frac{{K}_{0}-{\text{SOM}}_{0}}{\sqrt{1+{e}^{-B\left(z-{z}_{org}\right)}}}$$$ where $${\text{SOM}}_{0}$$, and $${K}_{0}$$ are the SOM values (g/g) when $$z$$ approaches the values of −∞ and +∞, respectively. $$B$$ is the decay rate (m −1 ), which is generally close to 50 m −1 based on in situ data (Chen et al., 2020). $${Z}_{org}$$ is the depth at which the maximum decay rate (or organic‐to‐mineral transition) occurs.…”

“…To minimize the amount of time for the SA optimization, we set $${K}_{0}$$ to a constant value (0.05 g/g), which was also used in Chen et al. (2020). We then performed four calibration experiments for the parameter optimization.…”