Researchers are helping Chattanooga get more localized measurements of airborne particulates.
Year after year, Chattanooga, Tenn., ranks as one of the most challenging cities to live in for people who suffer from asthma and seasonal allergies, according to the Asthma and Allergy Foundation of America. It was eighth on the list for 2015, sixth the year before.
To help the city better target its air quality efforts and give asthma sufferers more information on which areas they should avoid, a team of researchers from the University of Texas at Dallas are working to install highly sensitive sensors to map in real time the areas with the most particulate matter in the air.
The Geolocated Allergen Sensing Platform will help “determine whether real-time allergen and pollution collection and analysis on very fine geographic scales -- the scale of a city block or less -- can improve health and wellness,” David Lary, the project’s principal investigator, told GCN. “The amount of pollution and allergens we encounter can be orders of magnitude different depending on which route you take.”
GASP aims to create a network of sensors throughout the city to make it possible to know where the most polluted areas are. If Google Maps can give travelers the quickest route to their destination, then GASP may be able to give residents the least polluted route, Lary said.
Currently, particulate matter is measured by sensors provided by the Environmental Protection Agency, he said. Those sensors, while well calibrated, are very expensive, making them impractical for the street-level analysis that would be required for a system like GASP.
The GASP sensor uses a laser to detect and measure the particulates and pollen. Based on research Lary has done in Texas, he estimates that sensors would be needed every half a kilometer to five kilometers.
The brains of the sensor is the Waggle platform, created by the Department of Energy's Argonne National Laboratory and used in Chicago’s Array of Things. Waggle is an onboard computer that analyzes the data and is capable of machine learning that helps in the calibration of the device.
Waggle will be connected to the city’s high-speed fiber network to provide real-time updates through an application programming interface. A longer-term goal is setting up a dashboard with visualizations, he said.
Right now there is only one sensor deployed in Chattanooga. It was installed last fall to so it could be calibrated during the pollen season and will go through another round of calibration in the spring. Funding from the National Science Foundation will cover eight sensors in all. Lary doesn’t have a hard timeline for when the remaining ones will go up, but said the team is working quickly.
“The combined use of all these technologies -- big data, remote sensing, network connectivity, machine learning, the so-called Internet of Things -- it’s all very up-and-coming,” Lary said. “It’s an approach that has tremendous potential to have a massive societal impact.”
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