> For the complete documentation index, see [llms.txt](https://satdocs.hydrosat.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://satdocs.hydrosat.com/use-cases/industrial-monitoring-with-thermal-imagery.md). # Industrial Monitoring with Thermal Imagery Use case area: Energy and Industrial Industrial facilities contain many processes that generate, transfer, or release heat. While these processes may be difficult to distinguish in visible imagery alone, thermal imagery provides an effective way to observe activity across a site and over time. By comparing thermal observations temporally, we can identify changes in heat signatures associated with operational units, flaring, water discharge, and other industrial processes. ## Seeing industrial activity in thermal data The images below show Hydrosat longwave infrared observations of the Mina Al-Ahmadi and Mina Abdullah refinery sites in Kuwait. At first glance, visible imagery provides useful context about the layout of the facilities. Thermal imagery adds another layer of information by showing differences in emitted heat across the site.

A 70x70km Hydrosat scene shown in the visible and thermal bands, with an industrial center highlighted.

Areas with stronger thermal signals stand out from their surroundings, making it possible to see where heat-producing processes are occurring within a large and complex industrial facility. ### Looking at change over time A single thermal image provides a snapshot. Because industrial processes are so dynamic, repeated observations make it possible to compare activity from one date to another. Hydrosat collected multiple observations of the refinery sites between September 2025 and January 2026, including both daytime and nighttime imagery.

Temperature signals above a set threshold are shown over an ESRI basemap.

Across the series, some thermal features remain relatively consistent while others appear, disappear, or change in intensity. These differences provide a simple way to identify areas where facility activity levels are changing. ### Identifying changes within a facility Looking more closely at individual parts of the site reveals several examples of changing thermal activity.

Temperature increases from darker to brighter tones, while cooler values below the threshold are rendered transparent.

Flaring is clearly visible in some observations and absent in others. Other parts of the facility shift between higher and lower levels of thermal activity, as indicated by temperature. Comparing the same locations across dates makes these changes easier to distinguish from the surrounding background. Thermal imagery can also reveal features beyond the main processing areas.

Industrial outflow is clearly visible in this nighttime image due to the temperature contrast of the water body.

In this example, a warm industrial discharge is visible in the January 14 nighttime observation. A nearby tailings basin also shows a thermal signal on some dates but not others. These examples illustrate an important advantage of thermal monitoring: rather than relying only on how a facility looks with visible imagery, we can observe how its heat signature physically changes over time to understand aspects that are on, off, or operating at different thresholds. ## Why thermal imagery? Industrial sites can be large, complex, and geographically dispersed. Satellite thermal imagery provides a consistent way to observe heat-producing activity across these sites without requiring sensors to be installed at each facility. Repeated thermal observations can help analysts: * Monitor variations in facility activity * Identify persistent or intermittent heat sources * Observe flaring and other high-temperature events * Monitor discharge and thermal patterns around infrastructure * Compare activity across multiple facilities or dates Large-area coverage, spectral diversity, frequent revisit, and nighttime imaging make it possible to monitor industrial activity across broad areas and compare changing thermal conditions consistently over time. Thermal data provides a key physical signal that identifies when, where and to what degree industrial changes happen.