High
In space and astronautical engineering, 'high' refers to altitudes or orbits that are significantly above the Earth's surface. The term 'high' is relative and can vary depending on the context, but generally refers to altitudes above 100 kilometers. High-altitude flights and missions require specialized equipment and technology due to the extreme conditions, such as low atmospheric pressure and temperature, that exist at these altitudes. High-altitude balloons, rockets, and satellites are examples of vehicles and platforms used for scientific research, telecommunications, and remote sensing. In addition, high orbits around the Earth, such as geostationary and Molniya orbits, are used for communication and navigation purposes. High-altitude and high-orbit missions are critical for advancing our understanding of the universe and improving our daily lives on Earth.
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