论文标题
来自空间和地面观测的流星定位的准确性
Accuracy of meteor positioning from space-and ground-based observations
论文作者
论文摘要
目标。从流星衍生的轨道和起源的知识对于研究流星和早期太阳系很重要。随着纳米 - 卫星项目的增加，专门针对地球观测或流星观测（例如Meteorix Cubesat），我们研究了使用一对摄像机使用一对摄像机，一个部署在太空中和地面上的一个摄像机，并旨在了解准确性和主要的驱动因素。这项研究将揭示系统设置的要求和有利于流星三角测量的几何形状。方法。这封信介绍了空间和地面的立体测量原理，以及错误分析。具体而言，研究了相机分辨率的影响，卫星的态度和轨道确定精度以及移动目标和观察者形成的几何形状。结果。为了达到1公里的理想定位精度，有必要为卫星配备高准确的传感器（例如，星形跟踪器和GPS接收器）以执行良好的态度和轨道测定。当目标处于30度的高度时，最佳准确性可能会发生。关于地面站。
Aims. The knowledge of the orbits and origins derived from meteors is important for the study of meteoroids and of the early solar system. With an increase in nano-satellite projects dedicated to Earth observations or directly to meteor observations (e.g., the Meteorix CubeSat), we investigate the stereoscopic measurement of meteor positions using a pair of cameras, one deployed in space and one on the ground, and aim to understand the accuracy and the main driving factors. This study will reveal the requirements for system setups and the geometry favorable for meteor triangulation. Methods. This Letter presents the principle of the stereoscopic measurement from space and the ground, and an error analysis. Specifically, the impacts of the resolutions of the cameras, the attitude and orbit determination accuracy of the satellite, and the geometry formed by the moving target and observers are investigated. Results. To reach a desirable positioning accuracy of 1 km it is necessary to equip the satellite with high-accuracy sensors (e.g., star tracker and GPS receiver) to perform fine attitude and orbit determination. The best accuracy can occur when the target is at an elevation of 30 deg. with respect to the ground station.
