There is a gap between what satellites can measure and what anyone is acting on.

We continuously ingest open satellite and government data: Sentinel-1 synthetic aperture radar for surface and structural change, NASA GRACE-FO for groundwater storage anomalies, NASA FIRMS for active fire and smoke, USGS streamflow, FEMA flood mapping, EPA environmental justice screening, Census demographic data, CDC health measures, and FCC broadband coverage.

The question we ask of that data is narrow: where do the physical signals indicate need, and the response records indicate nobody is watching? That divergence, measured need against absent response, is what we look for.

Every detection becomes a brief. A brief is a plain document.

Briefs are written to be handed to a person doing the work. Not a pitch, not a proposal. If a community organization cannot read it and immediately see whether it is useful, it is not finished.

The uncertainty section is not optional. Remote sensing infers; it does not observe directly. A brief that hides its error bars is worse than no brief.

Briefs go directly to the people already embedded in a region: community organizations, regional researchers, practitioners, and agencies working the problem on the ground.

This is the part that distinguishes Caelus. We are not building an audience and waiting for the right person to find us. We identify who is already doing the work in a place, and we bring them what we found.

Every brief is also opened publicly, so that anyone who wants to build a response can. Students, researchers, engineers, and organizations can claim a brief and build against it.

Caelus does not take equity, does not own what you build, and does not require an application to start reading.