Monitoring the planet from Earth and Space

 NEXT WEBINAR  | May 7th 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.

Our Services

Satellite data provider for atmospheric composition

GAPMAP provides space data for atmospheric characterization, offering customers information on atmospheric composition and surface products.

Remote Sensing consulting

Validations and reports about remote sensing activities such as satellite cal/val, satellite application viability studies, evaluation reports of air quality, etc.

Retrieval software for Earth Observation Remote Sensing

GRASP retrieval algorithm is a totally generalized tool that can be adapted for the inversion of any remote sensing measurement to obtain atmospheric or surface related products.

Development of Satellite product retrieval

Development of a production system: A complete chain from raw data to results, from level 0 to 4, including user interface and all the tools you need to get the most out of the code.
We bring deep expertise in all areas of Earth Observation remote sensing
Monitor. Understand.
Act.

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.