Daniel Wolfensberger
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Scattering parameters of a wet radome Open
The radome of weather radars can be covered with a layer of water, degrading the quality of the radar products. Considering a simplified setup with a planar replica of the Swiss weather radars’ radome, we measure and model analytically its…
View article: Drone-based photogrammetry combined with deep learning to estimate hail size distributions and melting of hail on the ground
Drone-based photogrammetry combined with deep learning to estimate hail size distributions and melting of hail on the ground Open
Hail is a major threat associated with severe thunderstorms, and estimating the hail size is important for issuing warnings to the public. For the validation of existing operational, radar-derived hail estimates, ground-based observations …
On the polarimetric backscatter by a still or quasi-still wind turbine Open
Wind turbines negatively affect the performance of weather radars, especially when located in the proximity of a radar site. In March 2019, MeteoSwiss performed a measurement campaign by deploying a mobile X-band radar in Schaffhausen. It …
View article: Comment on amt-2023-89
Comment on amt-2023-89 Open
Abstract. Hail is a major threat associated with severe thunderstorms and an estimation of the hail size is important for issuing warnings to the public. Operational radar products exist that estimate the size of the expected hail. For the…
View article: Drone-based photogrammetry combined with deep-learning to estimate hail size distributions and melting of hail on the ground
Drone-based photogrammetry combined with deep-learning to estimate hail size distributions and melting of hail on the ground Open
Hail is a major threat associated with severe thunderstorms and an estimation of the hail size is important for issuing warnings to the public. Operational radar products exist that estimate the size of the expected hail. For the verificat…
Comment on amt-2022-316 Open
Abstract. A still wind turbine (WT) observed with a fixed pointing radar antenna shows peculiar polarimetric signatures: during two minutes (from 17:08 to 17:10 UTC) of the first day (March 4, 2020) of the WT MeteoSwiss X-band radar campai…
View article: Drone-based hail observations and the retrieval of the hail size distribution after a supercell passage in summer 2021 in Switzerland
Drone-based hail observations and the retrieval of the hail size distribution after a supercell passage in summer 2021 in Switzerland Open
Hail is a major threat connected to severe thunderstorms and an estimation of the hail size is important to issue warnings for the public. Radar real-time products exist that estimate the size of the expected hail. For the verification of …
CommeComment on "On the peculiar polarimetric signatures backscattered by a still or quasi-still wind turbine acquired by an X-band radar in stare mode at high temporal resolution (64 ms): preliminary investigations"nt on amt-2022-316 Open
Abstract. A still wind turbine (WT) observed with a fixed pointing radar antenna shows peculiar polarimetric signatures: during two minutes (from 17:08 to 17:10 UTC) of the first day (March 4, 2020) of the WT MeteoSwiss X-band radar campai…
On the peculiar polarimetric signatures backscattered by a still or quasi-still wind turbine acquired by an X-band radar in stare mode at high temporal resolution (64 ms): preliminary investigations Open
A still wind turbine (WT) observed with a fixed pointing radar antenna shows peculiar polarimetric signatures: during two minutes (from 17:08 to 17:10 UTC) of the first day (March 4, 2020) of the WT MeteoSwiss X-band radar campaign in Scha…
RainForest: a random forest algorithm for quantitative precipitation estimation over Switzerland Open
Quantitative precipitation estimation (QPE) is a difficult task, particularly in complex topography, and requires the adjustment of empirical relations between radar observables and precipitation quantities, as well as methods to transform…
Review of RainForest: A random forest algorithm for quantitative precipitation estimation over Swizerland Open
The work deal with quantitative precipitation estimations (QPEs) in complex horography.Both weather radar based estimations and ground measurements suffer from several limitations.Hence, combining both source of observations is mandatory b…
R2D2: A Region-Based Recursive Doppler Dealiasing Algorithm for Operational Weather Radar Open
Region-based Recursive Doppler Dealiasing (R2D2) is a novel dealiasing algorithm to unfold Doppler velocity fields obtained by operational radar measurements. It specializes in resolving issues when the magnitude of the gate-to-gate veloci…
RainForest: A random forest algorithm for quantitative precipitation estimation over Swizerland Open
Quantitative precipitation estimation (QPE) is a difficult task, particularly in complex topography, and requires the adjustment of empirical relations between radar observables and precipitation quantities, as well as methods to transform…
From model to radar variables: a new forward polarimetric radar operator for COSMO Open
In this work, a new forward polarimetric radar operator for the COSMO numerical weather prediction (NWP) model is proposed. This operator is able to simulate measurements of radar reflectivity at horizontal polarization, differential refle…
A polarimetric radar operator to evaluate precipitation from the COSMO atmospheric model Open
Weather radars provide real-time measurements of precipitation at a high temporal and spatial resolution and over a large domain. A drawback, however, it that these measurements are indirect and require careful interpretation to yield rele…
wolfidan/cosmo_pol: cosmo_pol Open
First release of cosmo_pol a polarimetric radar operator for the COSMO NWP model
From model to radar variables: a new forward polarimetric radar operator for COSMO Open
In this work, a new forward polarimetric radar operator for the COSMO numerical weather prediction (NWP) model is proposed. This operator is able to simulate measurements of radar reflectivity at horizontal polarization, differential refle…
Multifractal evaluation of simulated precipitation intensities from the COSMO NWP model Open
The framework of universal multifractals (UM) characterizes the spatio-temporal variability in geophysical data over a wide range of scales with only a limited number of scale-invariant parameters. This work aims to clarify the link betwee…
Multifractal evaluation of simulated precipitationintensities from the COSMO NWP model Open
The framework of universal multifractals allows to characterize the spatio-temporal variability of fields over a wide range of scales with only a limited number of scale-invariant parameters. In this work, we perform a multifractal analysi…