Patrick Stegmann
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Technical Report on the TSTOF Measurement Method: Technical Basics, Historical Development, and Comparison with Other Laser-Based Measurement Methods Open
The TSTOF stands for the time-shift time-of-flight measurement method, which is used to characterize individual dynamic particles—such as droplets in droplet clouds or particles in flows—in various industrial applications. Over the past 15…
Toward Aerosol-Aware Thermal Infrared Radiance Data Assimilation Open
Aerosols considerably reduce the upwelling radiance in the thermal infrared (IR) window; thus, it is worthwhile to understand the effects and challenges of assimilating aerosol-affected (i.e., hazy-sky) IR observations for all-sky data ass…
The Community Radiative Transfer Model (CRTM): Community-Focused Collaborative Model Development Accelerating Research to Operations Open
The Joint Center for Satellite Data Assimilation (JCSDA) Community Radiative Transfer Model (CRTM) is a fast, 1D radiative transfer model used in numerical weather prediction, calibration/validation, etc., across multiple federal agencies …
View article: Impact of Assimilating Satellite and Glider Observations on Hurricane Isaias (2020) Forecast Using Marine JEDI
Impact of Assimilating Satellite and Glider Observations on Hurricane Isaias (2020) Forecast Using Marine JEDI Open
Realistic ocean initial conditions are essential for coupled hurricane forecasts. This study focuses on the impact of assimilating high-resolution ocean observations for initialization of the Modular Ocean Model (MOM6) in a coupled configu…
Building an EPS-SG Microwave Imager Retrieval Suite: Level-1 Proxy Data Record Open
Following the success of MetOp, EUMETSAT Polar System Second Generation (EPS-SG) will provide satellite observations from polar orbit to support Numerical Weather Prediction and climate monitoring in the 2024 to mid-2040's timeframe. Desig…
View article: Implementation of a Discrete Dipole Approximation Scattering Database Into Community Radiative Transfer Model
Implementation of a Discrete Dipole Approximation Scattering Database Into Community Radiative Transfer Model Open
The Community Radiative Transfer Model (CRTM) is a fast model that requires bulk optical properties of hydrometeors in the form of lookup tables to simulate all‐sky satellite radiances. Current cloud scattering lookup tables of CRTM were g…
Comment on gmd-2021-439 Open
Abstract. DISAMAR (determining instrument specifications and analysing methods for atmospheric retrieval) is a computer model developed to simulate retrievals of properties of atmospheric trace gases, aerosols, clouds, and the ground surfa…
Temperature-dependent optical constants of water in the thermal infrared derived from data archaeology Open
This paper describes a data archaeology and rescue of temperature-dependent thermal infrared (IR) optical constants for liquid water from previously published works. The data rescue is based upon digitization of a figure published by Pinkl…
The Aerosol Module in the Community Radiative Transfer Model (v2.2 and v2.3): accounting for aerosol transmittance effects on the radiance observation operator Open
The Community Radiative Transfer Model (CRTM), a sensor-based radiative transfer model, has been used within the Gridpoint Statistical Interpolation (GSI) system for directly assimilating radiances from infrared and microwave sensors. We c…
The Influence of Aerosols on Satellite Infrared Radiance Simulations and Jacobians: Numerical Experiments of CRTM and GSI Open
For a variational data assimilation (DA) system that assimilates radiance observations, the simulated brightness temperature (BT) at the top of the atmosphere and the corresponding Jacobians carried out by the radiance observation operator…
Temperature-Dependent Thermal IR Optical Constants of Water from Data Archaeology (v1.0) Open
Temperature-Dependent Thermal IR Optical Constants of Water from Data Archaeology (v1.0)OVERVIEW:These files contain temperature-dependent thermal IR optical constants of water derived from a data archaeology and rescue of reflectance data…
Sample data and fixed files for running 'fv3aerorad' in GSI Open
The tarball, "fv3aerorad.tar.gz", contains the sample data and fixed files to run the regression test, 'fv3aerorad', in community Gridpoint Statistical Interpolation (GSI; https://doi.org/10.5281/zenodo.5735601).
Sample data and fixed files for running 'fv3aerorad' in GSI Open
The tarball, "fv3aerorad.tar.gz", contains the sample data and fixed files to run the regression test, 'fv3aerorad', in community Gridpoint Statistical Interpolation (GSI; https://doi.org/10.5281/zenodo.5735601).
Comment on gmd-2021-145 Open
Abstract. The Community Radiative Transfer Model (CRTM), a sensor-based radiative transfer model, has been used within the Gridpoint Statistical Interpolation (GSI) system for directly assimilating radiances from infrared and microwave sen…
The Aerosol Module in the Community Radiative Transfer Model (v2.2 and v2.3): accounting for aerosol transmittance effects on the radiance observation operator Open
The Community Radiative Transfer Model (CRTM), a sensor-based radiative transfer model, has been used within the Gridpoint Statistical Interpolation (GSI) system for directly assimilating radiances from infrared and microwave sensors. We c…
Simulation of light scattering from a colloidal droplet using a polarized Monte Carlo method: application to the time-shift technique Open
This study is devoted to the development and application of a Monte Carlo ray-tracing model to simulate light scattering when a colloid suspension droplet passes through a highly focused Gaussian laser sheet. Within this study, a colloidal…
Modeling the single and multiple scattering properties of soot-laden mineral dust aerosols Open
Fractal particle morphologies are employed to study the light scattering properties of soot-laden mineral dust aerosols. The applicability of these models is assessed in comparison with measurements and other numerical studies. To quantify…