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The Public Health Applications in Remote Sensing (PHAiRS) project is engineering an enhanced syndromic surveillance system for dust-related respiratory diseases in the southwestern United States based on assimilating Earth observation (EO) data from NASA experimental satellites. There is a rich literature describing the roles and benefits of using EO data in public health, but most of the documentation...
NASA has organized a worldwide Aerosol Robotic Network (AERONET) of Sun photometers. These well characterized instruments (CIMEL Sun photometer) make aerosol optical depth measurements based on the transmission of the direct sunlight through the atmosphere in 5 and 8 spectral bands. AERONET aerosol retrievals are limited to clear sky conditions (no clouds or no cirrus clouds) and retrieve aerosol...
A method for vicarious calibration of solar reflection channels of satellite based radiometer with a ground based measurements of refractive index and size distribution of aerosol is proposed. The method is applied to vicarious calibration of ASTER. The results show a validity of the method.
This study is concerned with the quantitative prediction of dust storms in China. Some dust storms were observed in China for the period of 1-5 May 2005. These dust events have been simulated using an integrated wind erosion modeling system (IWEMS) which simulates all stages of dust cycle, from dust emission and transport to deposition. WMO 3 hourly synoptic reporting data for six spring seasons (March-...
The implications of climatic effects due to aerosols with a large variability like mineral dust serve as indicators of dust events and are examined. Airborne mineral dust can influence the climate by altering the radiative properties of the atmosphere. For instance, aerosols in the form of dust particles reflect the incoming solar radiation to space, thereby reducing the amount of radiation available...
Aerosol particles in the atmosphere can affect climate directly by interacting with solar and terrestrial radiation and indirectly by their effect on cloud microphysics, albedo, and precipitation. The atmospheric aerosol products have been derived operationally from multi-channel imaging data collected with the moderate resolution imaging spectroradiometers (MODIS) on board the NASA Terra and aqua...
Phase function of relatively large non-spherical aerosol particles containing bubbles is discussed. Aerosol particles distributed around just above the ocean are likely to contain bubbles and are likely to have a relatively large particles size and a non-spherical shape. The phase function of such aerosol particles is no longer followed as the well known phase function derived from Mie scattering...
The extinction-to-backscatter ratio (Sa) values and phase functions were calculated from mean properties of aerosol models determined from a statistically significant number of AERONET measurements. Cluster analysis by partitioning was used to categorize the AERONET data set based on several optical and physical characteristics of the aerosol. Using the mean values of the optical and microphysical...
An aerosol retrieval algorithm is currently under development in scope of the upcoming APEX hyperspectral imager. It will be able to close the gap between global remote sensing and one-dimensional in situ measurements of atmospheric particles. This paper presents a feasibility study of the proposed APEX aerosol retrieval approach for hyperspectral imagery with high spatial resolution. The extraction...
Aerosol particles, water vapor and clouds are the three important factors that affect the signals received by sensors. To remove the aerosol effect, some methods have been developed. MODIS aerosol products provided by NASA are based on the Dark Dense Vegetation (DDV) algorithm. The Synergy of Terra and Aqua MODIS (SYNTAM) method is developed recently that can be used to retrieval aerosol optical thickness...
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