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Sentinel-5P TROPOMI Aerosol Layer Height 1-Orbit L2 5.5km x 3.5km V1 (S5P_L2__AER_LH_HiR) at GES DISC

Starting from August 6th in 2019, Sentinel-5P TROPOMI along-track high spatial resolution (~5.5km at nadir) has been implemented. S5P_L2__AER_LH_HiR data collection contains the high spatial resolution products. For data prior to August 6th of 2019, please check S5P_L2__AER_LH data collection. The Sentinel-5 Precursor (Sentinel-5P or S5P) satellite mission is one of the European Space Agency's (ESA) new mission family - Sentinels, and it is a joint initiative between the Kingdom of Netherlands and the ESA. The sole payload on Sentinel-5P is the TROPspheric Monitoring Instrument (TROPOMI), which is a nadir-viewing 108 degree Field-of-View push-broom grating hyperspectral spectrometer, covering the wavelength of ultraviolet-visible (UV-VIS, 270nm to 495nm), near infrared (NIR, 675nm to 775nm), and shortwave infrared (SWIR, 2305nm-2385nm). Sentinel-5P is the first of the Atmospheric Composition Sentinels and is expected to provide measurements of ozone, NO2, SO2, CH4, CO, formaldehyde, aerosols and cloud at high spatial, temporal and spectral resolutions. Copernicus Sentinel-5P TROPOMI aerosol layer height algorithm applies a forward model, which includes the atmospheric model and radiative transfer model, and the Optimal Estimation retrieval method. The algorithm utilizes the Oxygen-A band near 760 nm to make spectral fitting with various aerosol layer pressure and aerosol optical thickness. The aerosol baseline model assumes a single uniformly distributed aerosol layer with a fixed pressure thickness and a constant aerosol volumn extinction coefficient and single scattering albedo. The aerosol parameterization is particularly suitable for free-tropospheric aerosols such as volcanic ash, desert dust and biomass burning. The product main outputs include the mid-pressure and mid-altitude of aerosol layers as well as aerosol optical thickness at 760 nm.

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