PROJECT CIRRUS -- PARTICULATE PAYLOAD CHARACTERISATION
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 Class: RESTRICTED - R&D
 Author: Materials Group

 The candidate payload is a climate-altering particulate blend with
 three functions:
   1. optical scatter for daylight and albedo effects
   2. hygroscopic behaviour for moisture handling
   3. radio-frequency coupling for active heating / steering tests

 The materials group is not recording formulation details in the
 document store. Bench records remain in the restricted lab notebook
 system. For programme purposes, the important observation is that the
 blend leaves a recoverable metallic fraction in ordinary environmental
 dust.

 FIELD SIGNATURE
 Road film, gutter dust, windscreen residue, and leaf-surface washings
 may show a magnetic response after a release window. This is not a
 defect. The ferrite-bearing fraction improves coupling and gives QA a
 cheap recovery marker. It also creates a public-observation problem:
 a person with a neodymium magnet and a car bumper can become an
 accidental sampler.

 RISK
 The magnetic signature is manageable while complaints are framed as
 road dust, brake dust, and ordinary urban contamination. It becomes
 harder if complainants connect the residue to persistent aircraft
 lines, plant stress, and local heat events in the same note.

 Next: [SAI-OPERATING-PRINCIPLE.TXT].