In order to make reasonable use of the electric energy of the thermal battery,the trajectory of thermal battery activated in the sky is considered.The thermal battery technical characteristics,working principle and activation methods are introduced.The research background is the thermal battery on short time,medium time and long time.The size and weight of the thermal battery under two different activation modes including ground activation and sky activation were analyzed and calculated.The results show that sky activation of the thermal battery can greatly reduce the size and weight which satisfy the goal of miniaturization and lightening of thermal battery better.

First of all,the deficiencies of noise interference and coherent interference based on drop edge trigger in radar radio frequency(RF) cover are analyzed, the research is focused on the interference response time and frequency agility signal adaptability. It is pointed out that the response time of coherent interference based on drop edge trigger is long, which is easy to be recognized by the operator and impossible to adapt to frequency agility signal. Therefore, the jamming method based on pulse cluster identification is proposed. The advantage of this method in anti-radar RF cover is analyzed, and its effectiveness is verified.