Monitoring the planet from Earth and Space
NEXT WEBINAR | April 22nd 1PM & 8PM CET (8AM & 2PM EDT)
Understanding Particulate Pollution measurements with Nephelometers
Nephelometers have played a central role in air quality research and regulatory monitoring since the 1960s. They are also among the core instruments used within the ACTRIS (Aerosol, Clouds, and Trace Gases Research Infrastructure) network to provide high-quality measurements of atmospheric aerosols. Despite their long-standing use, interpreting nephelometer data remains a challenge—even for experienced researchers. In this webinar, we will review the fundamentals of how nephelometers measure particulate matter, clarify what insights this data can and cannot provide, and discuss key factors that influence measurement capabilities and data quality. We will use the AirPhoton IN101 nephelometer—approved for use in ACTRIS, widely deployed globally by the SPARTAN network, and used by many research institutions in India—as a reference to explain the basic measurement principles. We’ll then introduce the IN102 model, highlighting how its hardware upgrades and integration with GRASP software enable enhanced characterization of particles, including estimates of size distribution and dry particulate mass.

GAPMAP: Pioneering the future of Air Quality assessment
GAPMAP mission marks a significant milestone as the first of its kind to be deployed for the assessment of particulate pollution in urban and community areas. With an in-orbit-demonstrator launched in April 2023, the whole constellation composed of 10 cubesats will offer a wealth of data on Earth’s surface, cloud formation and, notably, atmospheric aerosols, contributing vital insights for environmental monitoring and scientific research.
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GRASP EARTH
GRASP Earth is a company that works around algorithms, computer tools, ground-instruments and satellite payloads developed by researchers in the area of Environmental Sciences and Remote Sensing. Our intention is to conceptualize, develop and implement the use of advanced techniques in atmospheric science, particularly in air pollution, that can be used by the broad scientific community and adopted by industries and policy. We currently invest our best efforts in deploying our MAP constellation aimed to capture polarimeter data. Alongside our main activities in developing products from EO r&d, our purpose is to merge MAP data, ground data and public data through GRASP algorithm to create a synergistic product that enhances data quality for air pollution monitoring.























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