Before revision: Designed to cruise at slow speeds for long durations at altitudes of 60,000 to 100,000 ft , such aircraft could be used to collect, identify, and monitor environmental data to assess global climate change and assist in weather monitoring and forecasting.
After revision: Designed to cruise at slow speeds for long durations at altitudes of , such aircraft could be used to collect, identify, and monitor environmental data to assess global climate change and assist in weather monitoring and forecasting.