该程序是由美国运管局研究中心与美国国家运输安全委员会合作开发的，是一种从空中交通管制（ATC）雷达记录中获取飞机运动时程的技术。该技术利用雷达的距离和方位数据，以及下行链路的高度数据，导出一组扩展的数据，包括空速、升力、姿态角（俯仰、滚转和航向）等。该技术在商业航空事故调查和事故分析中应被证明是有用的数据来源涉及没有机载数据记录器的飞机（如军用、短途和通用航空）。
This program was developed by Ames Research Center, in cooperation with the National Transportation Safety Board, as a technique for deriving time histories of an aircraft's motion from Air Traffic Control (ATC) radar records. This technique uses the radar range and azimuth data, along with the downlinked altitude data, to derive an expanded set of data which includes airspeed, lift, attitude angles (pitch, roll, and heading), etc. This technique should prove useful as a source of data in the investigation of commercial airline accidents and in the analysis of accidents involving aircraft which do not have onboard data recorders (e.g., military, short-haul, and general aviation). (2020-04-19, Fortran, 22KB, 下载3次)