What is one criterion for selecting a launch site?

The criterion for selecting a launch site is based on the relationship between the site's elevation and the maximum expected altitude of the launch. Ensuring that the launch site is at least one-quarter of the maximum expected altitude allows for adequate safety margins and proper trajectory management. This height consideration is crucial because it helps in preventing accidents or failures during the launch phase that could result from ascending too quickly or not having enough clearance for a successful launch trajectory.

The choice focusing on maximum altitude also indirectly addresses factors such as wind patterns, environmental conditions, and potential impact zones, all of which are essential in evaluating the suitability of a launch site for safety and operational success. Selecting a site based on this altitude criterion contributes significantly to mission planning and risk mitigation strategies.