query_imagery

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Query eYKON's satellite imagery OBSERVATIONS (Copernicus Sentinel, via CDSE) over watched sites — refinery complexes, LNG terminals, large/medium ports, curated critical-mineral mines, AIS-derived anchorages, strait windows. sensor="s2_l2a" (default): Sentinel-2 optical, metric ndvi_median (median NDVI of clear pixels — a spectral proxy for surface cover, never a tonnage or activity claim). sensor="s1_grd": Sentinel-1 radar, bright_target_area_m2 and vessel_equivalents (an area estimate, not a count) — returned ONLY for sites the Sentinel-1 measurement study admitted; before admission it returns no rows and says so. Every row carries coverage_state. CRITICAL: a look that is not "clear" (cloudy, partly_cloudy, partial_swath, no_acquisition, processing_error) has a NULL value — it is NOT zero and NOT "no activity"; never add, average or compare values across such looks, say the site was not seen that date. Compare a clear value only with the site's OWN median (ratio_to_baseline, present when baseline_n >= 3). A site missing from the result was not looked at. Pass a bbox, or aoi_id, or kind to narrow. Cite "Contains modified Copernicus Sentinel data <year>" with any figure.