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首页> 外文期刊>Journal of Spacecraft and Rockets >HAMSAT-1 Precise Orbit Determination System and Performance
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HAMSAT-1 Precise Orbit Determination System and Performance

机译：HAMSAT-1精确轨道确定系统和性能

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The HAMSAT orbit determination system methodology and system performance were studied. Tracking data are the VHF oneway Doppler shift from the Bangalore and Lucknow ground stations. Tracking data (range rate) contain noise of the order of about 30 m/s and variable biases (central-frequency offset). The low-Earth-orbit mission's operational orbit determination software was suitably updated to handle HAMSAT tracking data. Achievable orbit determination accuracy is found to be about 2 km in position and 2 m/s in velocity. Orbit prediction accuracy is studied and qualified enough for meeting the mission requirement of facilitating spacecraft acquisition and tracking by TTC ground stations in subsequent orbits. Because of the irregular periodicity of generation of the NORAD TLE, a new TLE that is independent of NORAD is required through ODP. Estimated orbital elements are being converted into NORAD-TLE format for subsequent use by amateur radio operators.
机译：研究了HAMSAT轨道确定系统的方法和系统性能。跟踪数据是班加罗尔和勒克瑙地面站的甚高频单向多普勒频移。跟踪数据（测距率）包含大约30 m / s的噪声和可变偏差（中心频率偏移）。对低地球轨道飞行任务的运行轨道确定软件进行了适当更新，以处理HAMSAT跟踪数据。发现可以实现的轨道确定精度约为2 km的位置和2 m / s的速度。对轨道的预测精度进行了研究，并足以满足任务要求，以便利TTC地面站在随后的轨道中进行航天器的获取和跟踪。由于NORAD TLE的生成不规则，因此需要通过ODP来独立于NORAD的新TLE。估计的轨道元素将被转换为NORAD-TLE格式，以供业余无线电运营商随后使用。

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