ADS-B/AIS Load near SpaceBrief introduction
ADS-B/AIS Load near SpaceRefers to the area between the sea level 20km (close to the internationally recognized upper limit control airspace) and 100km (close to the internationally recognized floor space). It is customary to refer to the airspace range of spacecraft running as space space, which is generally more than 100km above the ground; The airspace range of aircraft flight is called air space, which is generally less than 20km above ground. Therefore, the adjacent space can be understood as the transition area from the air airspace to the space airspace. The adjacent space roughly includes most areas of the stratosphere of the atmosphere, the intermediate atmospheric region and parts of the ionospheric region.
The proximity to space airspace has not been systematically developed and utilized, and until recent years, the focus of the predominantly American space-faring powers on the adjacent space began to heat up, and the United States Air Force believes that proximity to space vehicles is bound to play an important role in future military operations.
ADS-B/AIS Load near SpaceThe characteristics
In the stratosphere, the atmosphere is mainly horizontal movement, basically there is no upper and lower convection phenomenon; the layer is dry, water vapor, impurities are rare, rain and lightning phenomenon is uncommon, the temperature is almost constant, humidity is close to zero. When the height reaches more than 40km, there is little ozone, so that a large amount of ultraviolet light passes through without being absorbed, ultraviolet intensity is extremely high, the atmosphere begins to ionize under ultraviolet light, forming a large number of positive, negative ions and free electrons, the content of about 30 times times the average atmospheric content, in the stratosphere, cosmic ray flux is high, High energy particles have high radiation intensity.
The middle layer height is about 50~80km, the atmosphere in the floor is already very thin, at the 80km altitude, the air density is only one out of 10,000 of the ground, the total atmosphere in the layer accounts for about 1/3000 of the total mass of the Earth's atmosphere. In such a space area, it can not only avoid the vast majority of ground attacks at present, but also improve the accuracy of military investigation and ground attack, and has great potential for intelligence gathering, real poor surveillance, communication support and air-to-ground combat.
