Table 3.

Risks and mitigation.

	risk	description/assessment	mitigation
	risks to operators	concentrated sulfuric acid, high-power lasers, high-pressure gas cylinders, propeller	standard safety procedures for caustics, lasers, gas cylinders; propeller fixed during launch phase
	risks to public on the ground	debris, uncontrolled recovery	operation in area of low population density, standard flight safety procedures
	risks to aircraft	air traffic concerns	FAA beacon and coordination operational altitude >65 000 feet
	risks from H2O release	chemical/radiative perturbation to stratosphere	none anticipated to be necessary
	risks from H2SO4 release	chemical/radiative perturbation to stratosphere	none anticipated to be necessary