Unified Linearized Vector Radiative Transfer Model:

aiming to a testbed for remote sensing of atmosphere, land, and ocean.

Latest version: 2.1.20 on 2020.05.04



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What Is UNL-VRTM?

UNL-VRTM was specifically designed for the simulation of atmospheric remote sensing observations and for the inversion of aerosol, gas, cloud, and/or surface properties from these observations. It is applied by research groups around the world to a wide range of Earth remote sensing problems. UNL-VRTM comprises VLIDORT for radiative transfer, a linearized Mie and a linearized T-Matrix code for aerosol single scattering, a Rayleigh scattering module, and line-by-line (LBL) gas absorption calculation with HITRAN database:


UNL-VRTM Flowchart



UNL-VRTM Features

Stokes
Vector RTM for simulation of light intensity and polarization
hyperspectral
Accurate UV-to-IR (0.2 - 40 micron) hyperspectral RTM
Jacobian
Online analytical Jacobian of Stokes to particle, gas, and surface properties
Satellite icon
Information content analysis for future satellite sensors
 Modular
Flexible configuration for aerosol/cloud, gas, atmosphere and surface modules
 CFA
Complementary Python utility package, pyunlvrtm
Open Source
Open source, open science



Acknowledgements

UNL NASA UIowa RT Solutions CFA
HITRAN UMBC