Glenmore–Abernethy · 15 July 2026
Sub-pixel heat-detection timeline
02Native layersFalse-negative comparison
15 July timeline
15 Jul at 11:48 BSTNOAA-21 VIIRS
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T4 brightness temperatureKelvin · scale recalculated for each pass
Fire Radiative PowerMega Watt · logarithmic colour scale
Contains OS data © Crown copyright and database right 2026
15 Jul at 11:48 BST · NOAA-21 VIIRS168 native footprints · no FIRMS detection
Loading 15 July satellite layers…
11:48 → 12:47 comparison
What did the 11:48 VIIRS pass measure before FIRMS flagged the fire?
Use T4 and T5 to compare all 168 footprints in the 11:48 pass. The four outlined footprints overlap the area of the three later FIRMS detections. The Sentinel steps show the 20 m variation inside those four footprints.