Aerostat

Aerostats are large, lighter-than-air vehicles that are designed to float in the atmosphere. They are typically filled with a lighter-than-air gas, such as helium, which provides the buoyancy needed for the aerostat to stay aloft.

Aerostats are often used for various purposes, including surveillance, communication, and research. They are equipped with sensors, cameras, and other equipment to gather data or perform specific tasks.

One common type of aerostat is the tethered aerostat, which is anchored to the ground with a cable. This allows the aerostat to remain in a fixed position and provides stability in windy conditions. Tethered aerostats are often used for long-term surveillance or communication purposes.

Another type of aerostat is the free-flying aerostat, which is not tethered to the ground. These aerostats can be maneuvered and controlled to some extent, allowing for more flexibility in their use. Free-flying aerostats are often used for short-term surveillance or research missions.

Overall, aerostats offer a cost-effective and versatile solution for various applications that require a stable platform in the air.