When Marine Cloud Brightening or Stratospheric Aerosol Injection is done at sufficient scale, Reflective Earth will measure or estimate its effectiveness.  Making that determination will benefit from knowing the distribution of sizes of aerosol particles released.  To measure particle size distributions, Reflective Earth has acquired a Dekati Electrical Low Pressure Impactor(ELPI) particle size analyzer.  Upon request, Reflective Earth will provide the analyzer, with or without a trained operator, to teams developing aerosol generation methods for Solar Radiation Modification.