Effects of the Disturbing Gravity on the Fall-Point of Trajectory Missile
|School||PLA Information Engineering University|
|Course||Geodesy and Survey Engineering|
|Keywords||Ballistic disturbing gravity Landing Error Earth's gravity field model Spherical harmonics Gravity anomaly Systematic errors Random error|
Various elements affecting the placement of ballistic missiles, the disturbing gravity is one of the factors that must be considered. Chinese researchers in the study the Disturbing Gravity missile placement has done a lot of qualitative analysis, this paper aims through a lot of calculations, quantitative analysis of ballistic missile flight disturbed missile impact point deviation caused by the gravitational pull. The creative work of this paper is mainly reflected in: (1) based on the location of the point of the active section of the missile shutdown speed, simulated missile Trajectory. Use of physical geodesy experimental zone gravity anomaly data Trajectory Disturbing Gravity gravity anomaly progressively residual method the disturbing gravity active segment of the missile. (2) based on the Tscherning-Rapp model, analysis of different heights, the magnitude and spectral sensitivity of different spectral domain Disturbing Gravity disturbing gravity with height propagation characteristics. By calculating the areas of physical geodesy experiments 1 'x 1', 5 'x 5', 20 'x 20' ground gravity anomaly data in a different role in the height of the missile placement of the ground gravity anomaly data most important function of height; calculated 1 'x 1', 5 'x 5', 20 'x 20' ground gravity anomaly data in different integration radius disturbance caused by gravitational missile impact point deviation, given 1 'x 1' 5 'x 5', 20 'x 20' ground gravity anomaly data integration radius. (3) analysis of the gravity field model with different bands passive segment disturbing gravity of the missile placement is given to calculate the passive segment Disturbing Gravity the best truncation order - order 36. Calculated a range of 12000km, the launch point is located in the country, the latitude and longitude of each difference of 5 °, 40 points uniformly distributed passive missile segment disturbance gravity, analysis of the disturbing gravity on the the missiles Passive paragraph point of impact, the results showed that: the launch point is located in the western region, gravitational perturbations caused by passive segment of the missile impact point deviation. (4) study the impact of the types of errors that may occur in the the calculated gravitational perturbations process for the placement of missiles. The results show that: the disturbance gravitational system error missile placement, error of 5mGal system of the missile active segment of more than 100 meters, the missile passive segment more than 700 meters. That to improve the accuracy of the model is essential to improve the precision of missile.