tinychaseLab · USGS webcams against the thermal_anomaly dex
Can a Webcam See What the Satellite Sees?
USGS points cameras at Kīlauea and keeps a frame every two minutes. A satellite passes once a night and files every hot pixel into the thermal_anomaly dex. Reduce a month of frames to numbers, no model, and line the two up night by night. They disagree, and the disagreements are physics.
25 August: a fountain at dusk, then the camera watched it cool
Crater-floor brightness on the wide camera, in its own luminance units above the month's dark baseline, one frame per ten minutes from 18:00 HST. The dashed line is the satellite's pass. Hover a point for the saturated-cell count.
Night by night, at the pass
For each of the 31 nights: how many ground cells held a saturated pixel when the satellite passed (bars), and the pass's summed fire radiative power (dots, log scale). Nights without a pass are read at 02:00 HST.
Where the camera stops seeing
Every night with a satellite detection, ordered by the largest single fire pixel. The camera's reading at that pass beside it.