一种分布式小卫星立体阵基线误差估计方法

3-D baseline error estimation method for distributed small satellites

针对分布式小卫星立体阵中沿航向基线与垂直航向基线互相耦合及无法分别估计的难题,提出了一种新的分布式小卫星立体基线误差估计方法.在图像域,利用图像配准方法分离两类基线,并通过图像配准与子空间分解的方法分别对两类基线误差进行估计.该方法操作简单,运算量小,估计精度达到了毫米级.

In 3-D distributed small satellites, the along-track baseline couples with the vertical-track ones, which makes it difficult to estimate them, respectively. A new 3-D baseline error estimation method for distributed small satellites is proposed in this paper. This method separates the two kinds of baselines through image registration in the field of the image and estimates the two kinds of baseline errors by image registration and subspace decomposition, respectively. The method is easy to operate with a small amount of computation. The mm-level precision can be achieved.