Macro‑Microbial Coherent Aerial Phenomena (MMCAP): A Testable Hypothesis and Multi‑Channel Protocol for a Subset of Unidentified Aerial Reports

We hypothesize that, under specific atmospheric conditions—high relative humidity (RH), elevated ambient electric field, and a dense dust/bioaerosol load—microbial consortia can transiently organize into mesoscale coherent aerial domains (1–50 m, 1–10 s). Such domains are expected to co‑express a reproducible multi‑signal signature: ultra‑weak optical emissions (biophotons), polarization‑sensitive lidar haze with micron‑scale settling speeds, narrow ELF/VLF spectral features, and concomitant VOC/microbiome anomalies in air samples. Two 2025 results raised the prior for MMCAP: (i) Technion observations of biofilm formation/persistence on dust grains transported aloft, establishing a micro‑scale mechanistic precedent; and (ii) a Nature Communications perspective documenting microbial traversal along the soil–plant–human gut axis, supporting the existence of cross‑environment traveler taxa. New in v1.3: we add an orbital case study tying the MMCAP framework to spaceborne observations: (a) PACE/OCI imagery of an extensive phytoplankton bloom (Australia, Feb‑2025) that demonstrates how microbe‑driven optical structures can be visible from orbit (via reflectance/fluorescence), and (b) established VIIRS Day/Night Band detections of bioluminescent “milky seas” (e.g., Java, 2019), which verify that microbial consortia can generate stable, night‑time optical radiance fields over basin scales. We incorporate a spectral disambiguation protocol (490 nm bacterial bioluminescence vs. chlorophyll‑a reflectance/fluorescence windows) and an orbital cross‑check to reduce false positives when classifying airborne events. We retain a falsifiable field protocol and define an MMC‑Index (normalized RH×E×Dust) to prioritize campaigns with objective acceptance criteria. Finally, we outline an atmospheric‑chamber recipe (Bacillus on dust; RH 70–95%; E‑field 50–300 V m⁻¹) to reproduce thresholds under controlled conditions. Instruments: we also propose a two‑tier follow‑up using KCR‑Lens/Probe as a high‑sensitivity, narrow‑band optical receiver for weak/short‑lived microbial emission, complementing PACE/VIIRS triggers.