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Geolocation of remotely sensed pixels by introspective landmarking
Geolocation of remotely sensed pixels by introspective landmarking
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机译:通过自省地标对遥感像素进行地理定位
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摘要
A method of geodetically locating pixels of a captured image of a planetary body comprises the steps of: detecting an object on the planetary body using an imaging sensor viewing the planetary body; matching the object to a predetermined landmark on the planetary body; and updating, at a time tk, a state vector representing kinematics of the imaging sensor, and tk representing a present update time. Updating the state vector at the present time occurs if, and only if, the matching step is successful. In addition, the method includes computing a line-of-sight (LOS) vector from the imaging sensor to the planetary body, based on observations of the planetary body and the kinematics of the state vector; and geodetically locating the pixels of the captured image, based on the LOS vector. The LOS vector is based only on (a) the predetermined landmark and (b) a position command from a ground processing segment to the imaging sensor.
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机译:一种在地理上定位行星体捕获图像像素的方法,包括以下步骤:使用成像传感器观察行星体来检测行星体上的物体;使物体与行星体上的预定地标匹配;并且在时间t k Sub>更新代表成像传感器运动学的状态向量,而t k Sub>代表当前更新时间。当前且仅当匹配步骤成功时,才更新状态向量。另外,该方法包括基于对行星体的观测和状态向量的运动学,计算从成像传感器到行星体的视线(LOS)向量;以及并根据LOS向量在地理上定位所捕获图像的像素。 LOS向量仅基于(a)预定界标和(b)从地面处理段到成像传感器的位置命令。
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