The moon gravity meter has good experimental effect on the earth before landing on the moon, but it can't normally work when astronaut set up the gravity meter on the moon on schedule.
登月前在地球上进行的试验效果良好，但是，当宇航员按登月计划在月球上布置好重力仪后，却不能正常工作。
2
The results show that this method can effectively improve the data rate and the effect of tracking aircraft in the process of aircraft landing.
真实数据验证了该方法可有效提高数据率和改善飞机降落过程中的跟踪效果。
3
Increasing arresting force and improving low-speed aero characteristics can increase allowable maximal landing mass with an enlarged envelope area, but changing glide slope Angle makes little effect.