There are a number of factors that determine the selection of balloon launch locations. Among those are mission duration, need for flights over low-population areas for safety reasons, the science to be collected during the mission, cost, wind speed and direction, and many more.
Launch locations include:
The balloon flights from launch locations in the U.S. are usually short, hours to a day. These are called conventional balloon flights. The duration from other locations are longer, days to weeks. These are called long-duration balloon flights.
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